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    "textoCompleto" => "<span class="elsevierStyleSections"><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0025">Introduction</span><p id="par0005" class="elsevierStylePara elsevierViewall">The concept of exposome refers to the totality of environmental exposures that individuals experience during their lives and underlies a new approach to study of the role of the environment in human health&#46;<a class="elsevierStyleCrossRef" href="#bib0005"><span class="elsevierStyleSup">1</span></a> Linked to this concept&#44; the EXPOsOMICs project has the aim of assessing environmental exposures&#44; mainly environmental pollution and water contaminants&#44; using <span class="elsevierStyleItalic">omic</span> technologies that can look for associations between exposure data and biochemical and molecular changes&#46; The results will enhance our understanding of how contaminants influence the risk of developing both chronic diseases and different types of cancer&#46;<a class="elsevierStyleCrossRef" href="#bib0010"><span class="elsevierStyleSup">2</span></a></p><p id="par0010" class="elsevierStylePara elsevierViewall">Skin cancer is the most frequent type of cancer in humans&#46; As the skin is our most external organ and&#44; therefore&#44; the one in closest contact with the environment&#44; it is doubtlessly the most exposed to the effects of what is going on in our surroundings&#46; Of all possible types of exposure&#44; ultraviolet &#40;UV&#41; radiation from sunlight has been recognized as the primary causal agent of skin cancer&#46;<a class="elsevierStyleCrossRef" href="#bib0015"><span class="elsevierStyleSup">3</span></a> However&#44; in recent years&#44; there is mounting evidence that air pollution&#44; contaminants in water and food&#44; and lifestyle can also influence development of the cancer&#46; In a holistic concept of health&#44; and taking into account the interaction between the psyche and nervous&#44; endocrine&#44; and immune systems&#44; it is increasingly necessary to consider the influence of stress or sleep on the onset of cancer&#46;</p><p id="par0015" class="elsevierStylePara elsevierViewall">The present article aims to review available evidence on those external factors related to the onset of skin cancer of any type &#40;<a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>&#41;&#46;</p><elsevierMultimedia ident="fig0005"></elsevierMultimedia></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0030">Radiation</span><p id="par0020" class="elsevierStylePara elsevierViewall">UV radiation&#44; particularly in individuals with fair skin&#44; is the main cause of skin cancer&#44; particularly keratinocyte skin cancer and melanoma&#46;</p><p id="par0025" class="elsevierStylePara elsevierViewall">Both type B UV &#40;UVB&#41; and type B &#40;UVA&#41; radiation are considered as human carcinogens&#46;<a class="elsevierStyleCrossRef" href="#bib0015"><span class="elsevierStyleSup">3</span></a> It is known that UV radiation participates in the onset of cancer&#44; as UVB radiation induces direct DNA damage that gives rise to the formation of thymine dimers&#59; UVA also induces direct and indirect DNA damage through the production of reactive oxygen species &#40;ROS&#41; leading to simple or double-chain breaks and DNA-protein crosslinks&#44; and through oxidation to form 8-oxoguanine&#46;<a class="elsevierStyleCrossRef" href="#bib0020"><span class="elsevierStyleSup">4</span></a> This DNA damage induces p53 activation that can activate cell repair through nucleotide excision or drive the cell to apoptosis&#46;<a class="elsevierStyleCrossRef" href="#bib0025"><span class="elsevierStyleSup">5</span></a> If the <span class="elsevierStyleItalic">p53</span> gene undergoes a mutation due to UV radiation&#44; this process does not occur giving rise to clonal keratinocyte and melanocyte expansion with damaged DNA and to skin carcinogenesis&#46; Added to this&#44; UV radiation induces Langerhans cell depletion in the epidermis with the corresponding decreased skin immune surveillance and production of inflammatory cytokines&#44; a state that favors the development of skin cancer&#46;<a class="elsevierStyleCrossRef" href="#bib0030"><span class="elsevierStyleSup">6</span></a></p><p id="par0030" class="elsevierStylePara elsevierViewall">Epidemiological studies have shown that living in geographic areas with high levels of UV radiation is associated with an increased risk of skin cancer<a class="elsevierStyleCrossRef" href="#bib0035"><span class="elsevierStyleSup">7</span></a>&#59; squamous cell carcinoma &#40;SCC&#41; is more related to cumulative or occupational exposure whereas basal cell carcinoma &#40;BCC&#41; and melanoma appear more related to intense sporadic exposure and a history of sunburn&#46;<a class="elsevierStyleCrossRef" href="#bib0040"><span class="elsevierStyleSup">8</span></a></p><p id="par0035" class="elsevierStylePara elsevierViewall">The use of sunlamps increases the risk of developing both BCC and SCC proportionally with the extent of exposure&#44; when usage occurred during adolescence&#46;<a class="elsevierStyleCrossRef" href="#bib0045"><span class="elsevierStyleSup">9</span></a> The use of sunlamps has been associated with an increased risk of developing melanoma&#44; depending on the number of sessions and use at a young age &#40;&#60; 35 years&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0050"><span class="elsevierStyleSup">10</span></a></p><p id="par0040" class="elsevierStylePara elsevierViewall">Ionizing radiation has also been established as a cause of nonmelanoma skin cancer &#40;NMSC&#41;&#46; Thus&#44; occupational exposure in radiology technicians to low to moderate doses of radiation can increase the risk of BCC&#44; particularly in individuals with light-colored eyes and fair hair&#46;<a class="elsevierStyleCrossRef" href="#bib0055"><span class="elsevierStyleSup">11</span></a> An increased risk is also observed in those who undergo radiotherapy&#46;<a class="elsevierStyleCrossRef" href="#bib0060"><span class="elsevierStyleSup">12</span></a></p><p id="par0045" class="elsevierStylePara elsevierViewall">Cosmic radiation has been proposed as an agent that may induce melanoma and BCC in pilots and cabin crew&#46; This group has twice the incidence of melanoma compared with the general population and there is a relationship with the number of flight hours and therefore with cumulative radiation exposure&#46;<a class="elsevierStyleCrossRef" href="#bib0065"><span class="elsevierStyleSup">13</span></a> Nevertheless&#44; there is some doubt as to whether the lifestyle of this group of professionals may also have an effect&#46;<a class="elsevierStyleCrossRef" href="#bib0070"><span class="elsevierStyleSup">14</span></a></p><p id="par0050" class="elsevierStylePara elsevierViewall">Between 1950 and 2011&#44; an increase of 13&#37; was detected in erythematous radiation due to decreased ozone levels in 9 Spanish cities&#46;<a class="elsevierStyleCrossRef" href="#bib0075"><span class="elsevierStyleSup">15</span></a> The 1987 Montreal protocol banned the emission of chlorofluorocarbons leading to a decrease in the levels of these agents over the Antarctic&#44; with an associated decrease of 20&#37; in the resulting ozone depletion&#46;<a class="elsevierStyleCrossRef" href="#bib0080"><span class="elsevierStyleSup">16</span></a> This decrease without doubt can have repercussions for the amount of UVB radiation that we receive&#44; decreasing exposure and resulting&#44; perhaps in the future&#44; in a decrease in the incidence of skin cancer&#46;</p></span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0035">Temperature</span><p id="par0055" class="elsevierStylePara elsevierViewall">Heat can also be a risk factor for skin carcinogenesis&#46; In both cell cultures and experimental animals&#44; administration of repeat doses of UVB and heat &#40;39&#8239;&#176;<span class="elsevierStyleSmallCaps">C</span>&#41; reduces apoptosis&#44; deactivating p53-mediated response to stress and inducing expression of sirtuin 1 &#40;SIRT1&#41;&#46; Therefore&#44; both environmental factors act synergistically to allow the survival of cells with damaged DNA&#46;<a class="elsevierStyleCrossRef" href="#bib0085"><span class="elsevierStyleSup">17</span></a></p><p id="par0060" class="elsevierStylePara elsevierViewall">However&#44; this interaction is not clear cut&#46; A recent study has shown that if nude mice are first exposed to heat and then to UVB radiation&#44; tumor onset is delayed and&#44; in addition&#44; the tumors that developed were smaller than those in mice treated only with UVB or with UVB followed by heat&#46;<a class="elsevierStyleCrossRef" href="#bib0090"><span class="elsevierStyleSup">18</span></a></p></span><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0040">Pollution</span><p id="par0065" class="elsevierStylePara elsevierViewall">It is estimated that air pollution is responsible for approximately 7 million deaths worldwide every year&#46;<a class="elsevierStyleCrossRef" href="#bib0095"><span class="elsevierStyleSup">19</span></a> Its association with lung cancer is clear&#59; however&#44; its association with other cancers&#44; such as skin cancer&#44; has not been established&#46;</p><p id="par0070" class="elsevierStylePara elsevierViewall">The main air pollutants are polycyclic aromatic hydrocarbons &#40;PAHs&#41; &#40;including benzopyrenes&#41;&#44; which are derived mainly from automobile combustion and combustion of organic materials&#44; including cigarettes&#46; PAHs are the causal agents of scrotum cancer&#46;<a class="elsevierStyleCrossRef" href="#bib0100"><span class="elsevierStyleSup">20</span></a> In terms of the skin&#44; it has been shown that applying a mixture of PAHs chronically to the skin of nude mice induces papilloma and SCC formation&#44;<a class="elsevierStyleCrossRef" href="#bib0105"><span class="elsevierStyleSup">21</span></a> whereas 7&#44;12-dimethylbenzanthracene is able to induce lymphomas in hamsters&#46;<a class="elsevierStyleCrossRef" href="#bib0110"><span class="elsevierStyleSup">22</span></a></p><p id="par0075" class="elsevierStylePara elsevierViewall">Particulate material &#40;PM&#41; suspended in the atmosphere&#44; formed of a complex mixture of solid particles and liquid drops&#44; are of prime importance as harmful agents for the skin&#46; These are able to penetrate the follicles or enter the skin via a transdermal route&#46;<a class="elsevierStyleCrossRef" href="#bib0115"><span class="elsevierStyleSup">23</span></a> PM stimulates the production of ROS&#44; such as the superoxide anion or hydroxyl radical&#44; and favors the secretion of proinflammatory cytokines such as tumor necrosis factor&#44; interleukin &#40;IL&#41; 1a&#44; and IL-8&#46; Moreover&#44; these agents increase the presence of metalloproteinases &#40;MMP&#41; &#40;MMP-1&#44; MMP-2&#44; and MMP-9&#41;&#44; inducing collagen degradation and&#44; as a result&#44; photoaging&#46;<a class="elsevierStyleCrossRef" href="#bib0120"><span class="elsevierStyleSup">24</span></a></p><p id="par0080" class="elsevierStylePara elsevierViewall">Ultrafine particles are those that measure less than 100&#8239;nm in diameter and have greater harmful potential for health than PM&#46; These include carbon black and PAHs&#44; both associated with skin cancer&#46;<a class="elsevierStyleCrossRef" href="#bib0125"><span class="elsevierStyleSup">25</span></a> There is evidence of an increase in the incidence of melanoma&#44; but not NMSC&#44; in workers exposed to carbon black&#46;<a class="elsevierStyleCrossRef" href="#bib0130"><span class="elsevierStyleSup">26</span></a></p><p id="par0085" class="elsevierStylePara elsevierViewall">Nevertheless&#44; pollution can also contribute to a reduction in the amount of UV radiation that reaches the surface of the earth&#46; Thus&#44; decreases of up to 50&#37; are seen in UVB radiation levels on days of high pollution&#46; However&#44; UVA radiation is not attenuated by pollution&#44; and so the ratio of UVB&#47;UVA that reaches the earth&#8217;s surface may be impacted&#44; and the effects of this change are as yet unknown&#46;<a class="elsevierStyleCrossRef" href="#bib0095"><span class="elsevierStyleSup">19</span></a></p><p id="par0090" class="elsevierStylePara elsevierViewall">Moreover&#44; all agents that we are exposed to can interract to produce synergistic or antagonistic effects&#46; UV radiation in combination with PAHs increases photodamage to the skin&#44;<a class="elsevierStyleCrossRef" href="#bib0135"><span class="elsevierStyleSup">27</span></a> while UVA radiation increases the carcinogenic activity of benzopyrenes&#46;<a class="elsevierStyleCrossRef" href="#bib0140"><span class="elsevierStyleSup">28</span></a> Furthermore&#44; the microbiota of the skin&#44; and micrococci in particular&#44; may degrade benzopyrenes&#44; and as such they would constitute an innate defence mechanism against PAHs&#46;<a class="elsevierStyleCrossRef" href="#bib0145"><span class="elsevierStyleSup">29</span></a></p><p id="par0095" class="elsevierStylePara elsevierViewall">The most relevant epidemiological study to investigate the relationship between pollution and skin cancer was conducted in Saxony&#59; the study assessed the incidence of skin cancer between 2010 and 2014 in approximately 2 million individuals and found a relationship with existing pollution&#46;<a class="elsevierStyleCrossRef" href="#bib0150"><span class="elsevierStyleSup">30</span></a> In particular&#44; the authors found an association between PM10 &#40;10&#8239;&#181;g&#47;m<a class="elsevierStyleCrossRef" href="#bib0015"><span class="elsevierStyleSup">3</span></a>&#41; and NO<span class="elsevierStyleInf">2</span> and an increase in the relative risk of NMSC of 52&#37; and 7&#37; to 24&#37;&#44; respectively&#46; In contrast&#44; in this study&#44; a protective effect of green areas was found&#44; as an increase in 10&#37; of such areas reduced the relative risk of NMSC by 16&#37;&#46; One limitation of this study was that socioeconomic level and smoking habit were not taken into consideration&#46;<a class="elsevierStyleCrossRef" href="#bib0150"><span class="elsevierStyleSup">30</span></a></p></span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0045">Pesticides</span><p id="par0100" class="elsevierStylePara elsevierViewall">An increased exposure to pesticides has been shown to increase the risk of developing melanoma &#40;odds ratio &#91;OR&#93;&#44; 2&#46;1&#59; 95&#37; confidence interval &#91;CI&#93;&#44; 1-6&#46;9&#41;&#44; especially when exposed in an occupational setting &#40;OR&#44; 4&#46;23&#59; 95&#37; CI&#44; 1&#46;94-6&#46;31&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0155"><span class="elsevierStyleSup">31</span></a></p><p id="par0105" class="elsevierStylePara elsevierViewall">The AGRICAN Cohort study&#44; conducted in a cohort of 11 000 French agricultural workers followed for up to 6 years&#44; reported a significantly higher incidence of multiple myeloma in men and melanoma in women who had been exposed to pesticides&#46;<a class="elsevierStyleCrossRef" href="#bib0160"><span class="elsevierStyleSup">32</span></a></p><p id="par0110" class="elsevierStylePara elsevierViewall">Moreover&#44; a synergistic effect between exposure to pesticides and UV radiation has been demonstrated&#44; increasing the risk of melanoma with an OR increasing from 2&#46;6 &#40;95&#37; CI&#44; 1&#46;2-5&#46;6&#41; to 4&#46;7 &#40;95&#37; CI&#44; 1&#46;3-17&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0165"><span class="elsevierStyleSup">33</span></a></p><p id="par0115" class="elsevierStylePara elsevierViewall">Genetics has a modulating effect on these risk factors&#46; Certain polymorphisms in the glutathione S-transferase &#40;GST&#41; gene&#44; along with exposure to pesticides&#44; has been associated with a greater risk of cutaneous melanoma&#46; Likewise&#44; the unmutated <span class="elsevierStyleItalic">GSTM1</span> gene is a risk modifier for cutaneous melanoma in patients exposed to pesticides with an OR of 2&#46;8 &#40;95&#37; CI&#44; 1&#46;1-7&#46;1&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0170"><span class="elsevierStyleSup">34</span></a></p></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0050">Smoking Habit</span><p id="par0120" class="elsevierStylePara elsevierViewall">Epidemiological studies published on the risk of skin cancer in smokers have yielded contradictory results &#40;<a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a>&#41;&#46;<a class="elsevierStyleCrossRefs" href="#bib0175"><span class="elsevierStyleSup">35&#8211;40</span></a></p><elsevierMultimedia ident="tbl0005"></elsevierMultimedia><p id="par0125" class="elsevierStylePara elsevierViewall">In terms of genetics&#44; some single nucleotide polymorphisms in the <span class="elsevierStyleItalic">CHRNA5-A3-B4</span> gene have been associated with smoking and play a role in the development of melanoma&#46;<a class="elsevierStyleCrossRef" href="#bib0205"><span class="elsevierStyleSup">41</span></a> Furthermore&#44; 2 polymorphisms in the vitamin D receptor gene &#40;<span class="elsevierStyleItalic">BsmI-rs1544410</span> and <span class="elsevierStyleItalic">FokI-rs2228570</span>&#41; have been linked to susceptibility to obesity&#44; duration of smoking habit&#44; and severity of melanoma&#46;<a class="elsevierStyleCrossRef" href="#bib0210"><span class="elsevierStyleSup">42</span></a></p><p id="par0130" class="elsevierStylePara elsevierViewall">Experimental animal studies have shown that exposure to UV radiation and cigarette smoke has a synergistic effect for inducing SCC in mice&#46;<a class="elsevierStyleCrossRef" href="#bib0215"><span class="elsevierStyleSup">43</span></a></p><p id="par0135" class="elsevierStylePara elsevierViewall">Pathogenesis is established because cigarette smoke increases epidermal proliferation and induces ROS that oxidize DNA in fibroblasts&#46; Furthermore&#44; the affected fibroblasts induce the secretion of IL1&#945;&#44; IL-6&#44; IL-8&#44; basic fibroblast growth factor &#40;FGF&#41;&#44; monocyte chemotactic protein &#40;MCP&#41; 1&#44; and insulin growth factor type 4 &#40;IGFBP4&#41;&#44; which stimulate the proliferation of keratinocytes&#44; thereby favoring carcinogenesis in skin thorugh regulation of cell proliferation&#46; Acute oxidative stress compromises the DNA repair systems&#44; increasing the repair intervals and increases damage in the DNA in groups of smokers&#46;<a class="elsevierStyleCrossRefs" href="#bib0220"><span class="elsevierStyleSup">44&#44;45</span></a></p><p id="par0140" class="elsevierStylePara elsevierViewall">Finally&#44; it has been observed that smoking is a modifiable risk factor for the onset of other extracutaneous neoplasms in patients with a personal history of NMSC or melanoma&#46;<a class="elsevierStyleCrossRef" href="#bib0230"><span class="elsevierStyleSup">46</span></a></p></span><span id="sec0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0055">Diet</span><p id="par0145" class="elsevierStylePara elsevierViewall">The effect of diet on different dermatoses and neoplasms is a topic subject to debate&#46;<a class="elsevierStyleCrossRef" href="#bib0235"><span class="elsevierStyleSup">47</span></a>&#44;48</p><p id="par0150" class="elsevierStylePara elsevierViewall">With respect to vitamin intake&#44; studies have found an inverse relationship between serum levels of vitamin A &#40;retinol&#41; and its derivative &#946;-carotene with developing NMSC&#44;<a class="elsevierStyleCrossRefs" href="#bib0245"><span class="elsevierStyleSup">49&#44;50</span></a> whereas others have found the opposite&#46;<a class="elsevierStyleCrossRefs" href="#bib0255"><span class="elsevierStyleSup">51&#44;52</span></a> Clinical trials have assessed the effect of oral retinol supplements on the prevention of skin cancer and&#44; although most have not found a protective effect&#44;<a class="elsevierStyleCrossRefs" href="#bib0265"><span class="elsevierStyleSup">53&#8211;55</span></a> it appears that the risk of SCC is reduced in patients with a moderate initial risk&#46;<a class="elsevierStyleCrossRef" href="#bib0280"><span class="elsevierStyleSup">56</span></a></p><p id="par0155" class="elsevierStylePara elsevierViewall">Loss of the vitamin D &#40;VD&#41; receptor increases susceptibility to UV-induced skin tumorigenesis in mice&#46;<a class="elsevierStyleCrossRef" href="#bib0285"><span class="elsevierStyleSup">57</span></a> However&#44; studies in humans support an inverse effect of VD levels on risk of NMSC&#46;<a class="elsevierStyleCrossRef" href="#bib0290"><span class="elsevierStyleSup">58</span></a> A confounding factor is sun exposure&#44; which is positively correlated with both serum VD levels and skin cancer&#46; The role of VD in epidemiological studies is not clear&#44; although several pathological and molecular studies have shown a correlation between VD deficit and progression and prognosis of melanoma&#46;<a class="elsevierStyleCrossRef" href="#bib0295"><span class="elsevierStyleSup">59</span></a> Recently&#44; in a study of 204 invasive melanomas&#44; the role of VD was assessed&#46; A significant association was found between VD levels on diagnosis and site&#44; mitotic index of the tumor&#44; and ulceration&#44; while a borderline association with Breslow depth and body mass index was also found&#44; suggesting a role for VD levels in determining the aggressiveness of melanoma&#46;<a class="elsevierStyleCrossRef" href="#bib0300"><span class="elsevierStyleSup">60</span></a></p><p id="par0160" class="elsevierStylePara elsevierViewall">Selenium&#44; a micromineral antioxidant&#44; was postulated as a supplement that could decrease the effects of UVB radiation on DNA&#59; however&#44; in a clinical trial that administered an oral daily selenium supplement &#40;200&#8239;&#956;g&#41; to patients with a history of 2 or more BCC or one or more SCC&#44; paradoxically&#44; the risk of SCC increased&#46;<a class="elsevierStyleCrossRef" href="#bib0305"><span class="elsevierStyleSup">61</span></a></p><p id="par0165" class="elsevierStylePara elsevierViewall">In a cohort study&#44; intake of folic acid in diet was associated with a moderate increase in the risk of cutaneous melanoma&#46;<a class="elsevierStyleCrossRef" href="#bib0310"><span class="elsevierStyleSup">62</span></a> However&#44; the scientific evidence is still insufficient and other factors related to folic acid intake in diet that could explain this association need to be considered&#46;<a class="elsevierStyleCrossRef" href="#bib0310"><span class="elsevierStyleSup">62</span></a></p><p id="par0170" class="elsevierStylePara elsevierViewall">Contaminants in diet are&#44; however&#44; a serious problem&#44; particularly when they involve the water supply&#46; Thus&#44; it has been demonstrated that certain water contaminants&#44; such as arsenic and polychlorinated biphenyls&#44; may cause skin cancer&#46; The WHO has established that there is a risk of skin cancer when the arsenic concentration in water exceeds 10&#8239;&#956;g&#47;L&#46;<a class="elsevierStyleCrossRef" href="#bib0315"><span class="elsevierStyleSup">63</span></a> The issue was highlighted by the observation that the risk for developing keratinocytic tumors was 1&#46;5-fold greater in any rice consumers compared with nonconsumers &#40;95&#37; CI&#44; 1&#46;1-2&#46;0&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0320"><span class="elsevierStyleSup">64</span></a> The reason why rice has the arsenic content it does is because it is a crop that requires abundant water and this&#44; depending on the geographic area&#44; may contain notable quantities of arsenic&#46; Thus&#44; a clear association has been documented between BCC and SQQ with arsenic concentrations &#8239;&#60;&#8239;100ug&#47;L in South Asia&#44; China&#44; Taiwan&#44; Mexico&#44; eastern Europe&#44; and the United States&#46;<a class="elsevierStyleCrossRef" href="#bib0315"><span class="elsevierStyleSup">63</span></a></p><p id="par0175" class="elsevierStylePara elsevierViewall">Furthermore&#44; the effect of arsenic is modified by genetic susceptibility&#44; as occurs in polymorphisms of the gene encoding the arsenic methyltransferase gene&#59; these polymorphisms decrease the capacity to metabolize arsenic&#46;<a class="elsevierStyleCrossRef" href="#bib0325"><span class="elsevierStyleSup">65</span></a></p><p id="par0180" class="elsevierStylePara elsevierViewall">Polychlorinated biphenyls &#40;PCPs&#41; are extensively distributed in the environment&#44; whether through direct dumping by industries that use them or through combustion and dumping in rivers and marine waters of contaminated waste&#46; Fatty fish can contain significant quantities of polychlorinated biphenyls&#44; which impact melanogenesis and facilitate melanoma progression&#46; In contrast&#44; these fish are also rich in &#963;-3 polyunsaturated fatty acids&#44; which have an antineoplastic action on melanoma&#46; A cohort study found a hazard ratio &#40;HR&#41; of 4 &#40;95&#37; CI&#44; 1&#46;2-1&#46;3&#44; <span class="elsevierStyleItalic">P</span>&#8239;&#61;&#8239;&#46;02&#41; associated with PCBs&#44; whereas for the relationship with eicosapentaenoic&#47;docosahexaenoic acid intake&#44; the HR was 0&#46;2 &#40;95&#37; CI&#44; 0&#46;1-0&#46;8&#44; <span class="elsevierStyleItalic">P</span>&#8239;&#61;&#8239;&#46;003&#41;&#46; Therefore&#44; more studies are needed to really demonstrate whether consumption of this fish has a protective effect or may increase the risk of melanoma&#46;<a class="elsevierStyleCrossRef" href="#bib0330"><span class="elsevierStyleSup">66</span></a></p><p id="par0185" class="elsevierStylePara elsevierViewall">The association of Mediterranean diet with skin cancer has also been studied&#46; In French women&#44; closer adherence to this diet was associated with a reduction in the overall risk of developing skin cancer&#44; mainly through an inverse association with BCC incidence and a decrease in the risk of melanoma&#46; These results should also be confirmed in men and possible biases assessed&#44; but the results are sufficiently promising to be cited as an additional benefit when encouraging the Mediterranean diet in our patients&#46;<a class="elsevierStyleCrossRef" href="#bib0335"><span class="elsevierStyleSup">67</span></a></p><p id="par0190" class="elsevierStylePara elsevierViewall">Coffee and caffeine consumption is inversely and proportionally related to the risk of melanoma in several studies&#46; Specifically&#44; consumption of a cup of coffee a day decreased the risk of melanoma by 3&#37;&#46;<a class="elsevierStyleCrossRef" href="#bib0340"><span class="elsevierStyleSup">68</span></a> In contrast&#44; a metaanalysis found a dose-dependent relationship between caffeinated coffee consumption and incidence of BCC&#46;<a class="elsevierStyleCrossRef" href="#bib0345"><span class="elsevierStyleSup">69</span></a></p><p id="par0195" class="elsevierStylePara elsevierViewall">Finally&#44; dietary restriction alters both diurnal sensitivity to DNA damage caused by UVB radiation and expression of the <span class="elsevierStyleItalic">XPA</span> gene&#44; which is essential for DNA repair&#44; demonstrating the link between circadian rhythm&#44; food intake&#44; and skin health&#46;<a class="elsevierStyleCrossRef" href="#bib0350"><span class="elsevierStyleSup">70</span></a> All these studies conducted in humans that link diet with risk or not of developing skin cancer are summarized in <a class="elsevierStyleCrossRef" href="#tbl0010">Table 2</a>&#46;<a class="elsevierStyleCrossRefs" href="#bib0240"><span class="elsevierStyleSup">48&#44;58&#44;60&#8211;64&#44;66&#8211;69</span></a></p><elsevierMultimedia ident="tbl0010"></elsevierMultimedia></span><span id="sec0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0060">Physical Activity</span><p id="par0200" class="elsevierStylePara elsevierViewall">Numerous epidemiological studies have examined the relationship between physical activity and risk of NMSC and melanoma&#46; Athletes who practice sports outdoors receive high doses of UV radiation due to the long hours of training and competition with high exposure to sunlight&#44; and this effect increases in alpine sports due to the increase in UV radiation at altitude and reflection from surfaces coated with snow and ice&#46;<a class="elsevierStyleCrossRef" href="#bib0355"><span class="elsevierStyleSup">71</span></a> Thus&#44; extreme exposure to UV radiation in outdoor sports such as skiing&#44; mountain climbing&#44; or cycling or triathlon has been documented in a series of dosing studies&#46;<a class="elsevierStyleCrossRefs" href="#bib0360"><span class="elsevierStyleSup">72&#8211;75</span></a></p><p id="par0205" class="elsevierStylePara elsevierViewall">Extensive epidemiological studies show that recreational activities such as sunbathing on the beach or exposure during aquatic sports are associated with a greater risk of BCC&#44; whereas skiing has been shown to have a greater risk of SCC&#46;<a class="elsevierStyleCrossRefs" href="#bib0380"><span class="elsevierStyleSup">76&#8211;78</span></a> The incidence of BCC and SCC has been calculated in different groups of sports enthusiasts&#44; finding a greater risk of tumors in marathon runners&#44; an increased incidence of BCC in surfers&#44; and an increased prevalence of actinic keratosis in rock climbers&#46; However&#44; there are few studies&#44; the sample sizes are small&#44; and they do not include former sports player or retired athletes&#46;<a class="elsevierStyleCrossRefs" href="#bib0380"><span class="elsevierStyleSup">76&#44;77</span></a></p><p id="par0210" class="elsevierStylePara elsevierViewall">A metaanalysis that included 13949 patients who had recently been diagnosed with melanoma found that in cohort studies&#44; there is a greater risk of melanoma in patients with high physical activity &#40;relative risk&#8239;&#61;&#8239;1&#46;3&#59; 95&#37; CI&#8239;&#61;&#8239;1&#46;2-1&#46;4&#41;&#59; however&#44; this relationship was not shown in case-control studies&#44; probably because of confounding factors such as exposure to sunlight and phototype&#46;<a class="elsevierStyleCrossRef" href="#bib0395"><span class="elsevierStyleSup">79</span></a></p><p id="par0215" class="elsevierStylePara elsevierViewall">Some risk factors for cutaneous melanoma&#44; such as number of melanocytic nevi and solar lentigines&#44; are more frequent in individuals who practice sport outdoors&#46; In addition to substantial exposure to sunlight&#44; exercise-induced immunosuppression could increase the risk of NMSC and cutaneous melanoma in athletes&#46;<a class="elsevierStyleCrossRefs" href="#bib0390"><span class="elsevierStyleSup">78&#44;80</span></a></p><p id="par0220" class="elsevierStylePara elsevierViewall">However&#44; experimental studies suggest that exercise may have protective effects for skin cancer&#46; In <span class="elsevierStyleItalic">PTEN</span> knockout mice&#44; exercise prevents hepatocellular carcinoma and skin cancer induced by tetradecanoylphorbol-13-acetate &#40;TPA&#41; in an experimental animal model&#46;<a class="elsevierStyleCrossRef" href="#bib0405"><span class="elsevierStyleSup">81</span></a> Exercise stimulates secretion of circulating insulin growth factor &#40;IGF-1&#41; and the corresponding signal in TPA mice&#44; reducing the risk of skin cancer&#46; Furthermore&#44; exercise activates p53&#44; which increases p21&#44; IGFBP-3&#44; and PTEN&#44; in turn inducing down-regulation of the IGF-1 pathway&#44; contributing to prevention of skin cancer&#46;<a class="elsevierStyleCrossRefs" href="#bib0410"><span class="elsevierStyleSup">82&#8211;84</span></a></p><p id="par0225" class="elsevierStylePara elsevierViewall">In summary&#44; exercise may have a protective effect on skin cancer&#44; but not sufficient to compensate for the risk derived from excessive exposure UV radiation associated with outdoor sports&#59; probably the equilibrium is negatively influenced by inadequate photoprotection habits&#46; Therefore&#44; protective measures should be encouraged in those who practice outdoor sports&#46; Such measure include encouraging athletes to avoid training at times of maximum risk&#44; choosing appropriate clothing&#44; and applying water and sweat-resistant sunscreen&#46;<a class="elsevierStyleCrossRef" href="#bib0425"><span class="elsevierStyleSup">85</span></a></p></span><span id="sec0045" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0065">Circadian Rhythm</span><p id="par0230" class="elsevierStylePara elsevierViewall">Disruption of the circadian rhythm has been classified by the International Agency for Cancer Research as one of the most probable carcinogens based on the evidence from human and animal studies&#46;<a class="elsevierStyleCrossRef" href="#bib0430"><span class="elsevierStyleSup">86</span></a></p><p id="par0235" class="elsevierStylePara elsevierViewall">There is an increase in the standardized HR for melanoma in pilots &#40;2&#46;2 &#91;95&#37; CI&#44; 1&#46;7-2&#46;9&#93;&#41; and also in cabin crew in aircraft of 2&#46;1 &#40;95&#37; CI&#44; 1&#46;7-2&#46;9&#41;&#46; Penetration of UVA radiation through the windows is a plausible factor for pilots&#44; but not for the rest of the crew&#46; It has yet to be resolved whether the underlying cause for this observation is cosmic radiation&#44; lifestyles with more holidays with greater exposure to sunlight&#44; or disruption of the circadian rhythm&#46;<a class="elsevierStyleCrossRefs" href="#bib0435"><span class="elsevierStyleSup">87&#44;88</span></a></p><p id="par0240" class="elsevierStylePara elsevierViewall">Another group within the population who works shifts and has a higher incidence of melanoma are firemen&#59; in this group&#44; the results have been variable and the risk of melanoma is estimated to be 1&#46;3 &#40;95&#37; CI&#44; 1&#46;1-1&#46;6&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0445"><span class="elsevierStyleSup">89</span></a> Nevertheless&#44; it should be remembered that this group is exposed to potential carcinogenic compounds generated in fires&#44; such as PAHs&#44; which have been linked to NMSC&#46;<a class="elsevierStyleCrossRef" href="#bib0105"><span class="elsevierStyleSup">21</span></a></p><p id="par0245" class="elsevierStylePara elsevierViewall">In other shift workers such as nurses&#44; those who usually worked night shifts have an incidence of skin cancer 14&#37; lower than those who worked night shifts less regularly or never&#46;<a class="elsevierStyleCrossRef" href="#bib0450"><span class="elsevierStyleSup">90</span></a></p><p id="par0250" class="elsevierStylePara elsevierViewall">The influence of disruption to circadian rhythm on carcinogenesis is attributed to different possible mechanisms&#46; On one hand&#44; lower secretion of melatonin reduces anticarcinogenic and antioxidant acitivty<a class="elsevierStyleCrossRef" href="#bib0455"><span class="elsevierStyleSup">91</span></a>&#59; on the other&#44; there is a circadian regulation induced by UV radiation of certain DNA repair mechanisms&#44; as well as antioxidant cutaneous mechanisms&#46;<a class="elsevierStyleCrossRef" href="#bib0460"><span class="elsevierStyleSup">92</span></a> However&#44; the association with greater or lower incidence of skin cancer is not clear due to confounding factors&#44; such as decreased exposure to UV radiation due to working night shifts&#46;</p></span><span id="sec0050" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0070">Socioeconomic Status</span><p id="par0255" class="elsevierStylePara elsevierViewall">The impact of social and economic levels on cancer survival have been studied&#46; Economic inequalities in countries with limited healthcare access are responsible for worse melanoma prognosis because the tumor is diagnosed in more advanced stages&#46;<a class="elsevierStyleCrossRef" href="#bib0465"><span class="elsevierStyleSup">93</span></a> Thus&#44; a strong inverse correlation has been demonstrated between total healthcare spending per head and the ratio of melanoma incidence to the corresponding mortality &#40;r&#8239;&#61;&#8239;-0&#46;76&#44; <span class="elsevierStyleItalic">P</span>&#60;&#8239;&#46;05&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0470"><span class="elsevierStyleSup">94</span></a></p><p id="par0260" class="elsevierStylePara elsevierViewall">In Germany&#44; a study was conducted in 70 million inhabitants&#44; finding a direct correlation between a larger number of admissions and a lower level of education with a higher prevalence of melanoma and NMSC&#46;<a class="elsevierStyleCrossRef" href="#bib0475"><span class="elsevierStyleSup">95</span></a></p><p id="par0265" class="elsevierStylePara elsevierViewall">A multicenter study in 5 European countries &#40;France&#44; Germany&#44; Portugal&#44; Italy&#44; and Sweden&#41; found that there is a certain increment in the risk of skin cancer associated with greater socioeconomic level in middle-aged patients&#44; without any differences in older individuals&#46;<a class="elsevierStyleCrossRef" href="#bib0480"><span class="elsevierStyleSup">96</span></a></p></span><span id="sec0055" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0075">Microorganisms and Microbiota</span><p id="par0270" class="elsevierStylePara elsevierViewall">Certain microorganisms are known to play a role in some skin cancers&#44; in particular&#44; Merkel cell polyomavirus leading to Merkel cell carcinoma and human papillomaviurs&#46;<a class="elsevierStyleCrossRef" href="#bib0485"><span class="elsevierStyleSup">97</span></a> In the case of Merkel cell polyomavirus&#44; in a study of water analysis in Mediterranean countries&#44; this entity was found in 75&#37; of residual waters and in 29&#37; and 18&#37; of samples taken from rivers and the sea&#44; respectively&#46; The study affirms that water treatment and UV radiation eliminate between 2&#46;22 and 4&#46;52 log<span class="elsevierStyleInf">10</span> viral concentrations&#44; but global warming and limited rainfall could increase the presence of this virus and other water-born viruses&#46;<a class="elsevierStyleCrossRef" href="#bib0490"><span class="elsevierStyleSup">98</span></a></p><p id="par0275" class="elsevierStylePara elsevierViewall">It is known that <span class="elsevierStyleItalic">Propionibacterium acnes</span>&#44; one of the bacteria in our skin microbiota&#44; decreases synthesis of porphyrins on exposure to UVB radiation&#46;<a class="elsevierStyleCrossRef" href="#bib0495"><span class="elsevierStyleSup">99</span></a> UV radiation inhibits growth of <span class="elsevierStyleItalic">Malassezia furfur</span>&#44; a yeast in the microbiota that synthesizes pityriacitrin&#44; a substance with a photoprotective effect&#46;<a class="elsevierStyleCrossRef" href="#bib0500"><span class="elsevierStyleSup">100</span></a> Furthermore&#44; a relationship has been reported between development of melanoma and microorganisms of the <span class="elsevierStyleItalic">Fusobacterium</span> and <span class="elsevierStyleItalic">Trueperella</span> genera&#46;<a class="elsevierStyleCrossRef" href="#bib0505"><span class="elsevierStyleSup">101</span></a> On the other hand&#44; skin colonization of nude mice with a strain of <span class="elsevierStyleItalic">Staphylococcus epidermidis</span> from human microbiota that synthesizes 6-N-hydroxyaminopurine exercises a preventive role in the development of skin tumors in a model of photocarcinogenesis with UVB&#59; in contrast&#44; colonization by a strain of the same bacterium that does not produce 6-N-hydroxyaminopurine did not have any preventive effect&#46;<a class="elsevierStyleCrossRef" href="#bib0145"><span class="elsevierStyleSup">29</span></a> This could indicate that certain bacteria in the microbiota could lead to a protective effect or induce cancer when combined with UV radiation or sunlight&#46;</p><p id="par0280" class="elsevierStylePara elsevierViewall">But it is not just skin microbiota that might impact skin cancer&#46; Changes in the intestinal microbiota have been observed to bear a relationship with different responses to immunotherapy&#44; such that a greater diversity in intestinal microbiota and a greater growth of the <span class="elsevierStyleItalic">Ruminococcaceae</span> family favors response to immunotherapy with anti-PD-1 drugs&#46;<a class="elsevierStyleCrossRefs" href="#bib0510"><span class="elsevierStyleSup">102&#44;103</span></a></p></span><span id="sec0060" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0080">Conclusion</span><p id="par0285" class="elsevierStylePara elsevierViewall">This literature review shows that not only known factors such as UV and electromagnetic radiation but also factors such as environmental pollution&#44; including air pollution&#44; smoking&#44; and water contamination&#44; may have an impact on skin health and cancer genesis&#46; Some data are still contradictory or inconclusive&#44; and individual susceptibility&#44; determined by the genome itself&#44; along with perhaps other genes that cohabit with us&#44; in the microbiome&#44; should be taken into account&#46;</p></span></span>"
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          "titulo" => "Introduction"
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          "titulo" => "Radiation"
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          "titulo" => "Temperature"
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          "titulo" => "Pollution"
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          "identificador" => "sec0025"
          "titulo" => "Pesticides"
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          "identificador" => "sec0030"
          "titulo" => "Smoking Habit"
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          "identificador" => "sec0035"
          "titulo" => "Diet"
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          "identificador" => "sec0050"
          "titulo" => "Socioeconomic Status"
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          "identificador" => "sec0055"
          "titulo" => "Microorganisms and Microbiota"
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        15 => array:2 [
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    "fechaAceptado" => "2020-04-05"
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            0 => "Exposome"
            1 => "Skin cancer"
            2 => "Melanoma"
            3 => "Non melanoma skinc&#225;ncer"
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          "palabras" => array:4 [
            0 => "Exposoma"
            1 => "C&#225;ncer de piel"
            2 => "Melanoma"
            3 => "C&#225;ncer cut&#225;neo no melanoma"
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        "titulo" => "Abstract"
        "resumen" => "<span id="abst0005" class="elsevierStyleSection elsevierViewall"><p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">Skin cancer is the most frequent type of cancer in humans&#46; While exposure to solar radiation is the most widely known and relevant causal factor&#44; the different degrees of individual risk have not been fully elucidated&#46; Epidemiological studies show how the risk of skin cancer is affected by other types of radiation&#44; &#40;eg&#44; ionizing radiation&#41;&#44; pesticides&#44; particulate matter in air pollution&#44; toxins &#40;eg&#44; arsenic&#41; in water and some foods&#46; Some living entities&#44; such as polyomavirus and human papillomavirus&#44; can also cause specific types of cancer&#46; Lastly&#44; lifestyle factors such as stress&#44; sleep&#44; and exercise may play a role&#44; although only a few studies shed light on these factors&#46; The abovementioned factors make up the exposome of skin cancer&#44; that is&#44; the set of environmental exposures that&#44; together with the genome and microbiome&#44; determine the onset of disease&#46;</p></span>"
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      "es" => array:2 [
        "titulo" => "Resumen"
        "resumen" => "<span id="abst0010" class="elsevierStyleSection elsevierViewall"><p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">El c&#225;ncer de piel es el m&#225;s frecuente del ser humano&#46; Aunque la exposici&#243;n a la radiaci&#243;n solar constituye el factor causal m&#225;s conocido y relevante&#44; existe una variaci&#243;n en el riesgo individual no explicada completamente&#46; Diferentes estudios epidemiol&#243;gicos muestran la influencia de otras radiaciones&#44; como las ionizantes&#44; los pesticidas&#44; las part&#237;culas de la poluci&#243;n&#44; o los t&#243;xicos contenidos en el agua o algunos alimentos como el ars&#233;nico&#44; en el riesgo del c&#225;ncer de piel&#46; Adem&#225;s&#44; algunos agentes vivos como los poliomavirus o el VPH son agentes etiol&#243;gicos de algunos tipos concretos de c&#225;ncer cut&#225;neo&#46; Por &#250;ltimo&#44; algunos factores asociados al estilo de vida&#44; como el estr&#233;s&#44; el sue&#241;o&#44; o el ejercicio podr&#237;an influir&#44; aunque son muy escasos los estudios que aporten luz en estas &#225;reas&#46; Todo ello constituye el exposoma del c&#225;ncer cut&#225;neo&#44; el conjunto de exposiciones ambientales de un ser humano a lo largo de la vida que&#44; combinados con el genoma y el microbioma&#44; determinan la aparici&#243;n del mismo&#46;</p></span>"
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        "etiqueta" => "&#9734;"
        "nota" => "<p class="elsevierStyleNotepara" id="npar0005">Please cite this article as&#58; Gonz&#225;lez S&#44; Parrado C&#44; Gilaberte Y&#46; La influencia del exposoma en el c&#225;ncer de piel&#46; Actas Dermosifiliogr&#46; 2020&#59;111&#58;460&#8211;470&#46;</p>"
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          "en" => "<p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">Environmental exposure of an individual during his or her life&#44; habits&#44; and lifestyle&#44; that may influence the onset of skin cancer&#46;</p>"
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                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Reference&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Type of Study&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Number of Individuals&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Results of Association With Smoking Habit&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Thompson et al&#46;<a class="elsevierStyleCrossRef" href="#bib0175"><span class="elsevierStyleSup">35</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Metaanalysis &#40;6 cohort studies and 8 case-control studies&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">738661&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Increased risk of head and neck melanoma&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Song et al&#46;<a class="elsevierStyleCrossRef" href="#bib0180"><span class="elsevierStyleSup">36</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Metaanalyses and cohort study&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">145709&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">No association with risk of SCC was found&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">An inverse relationship with the onset of melanoma and BCC was found&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Jones et al&#46;<a class="elsevierStyleCrossRef" href="#bib0185"><span class="elsevierStyleSup">37</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Cohort study&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">4231&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Correlation with the appearance of lymphatic metastasis&#44; independently of the correlation with tumor thickness and ulceration&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Dusingize et al&#46;<a class="elsevierStyleCrossRef" href="#bib0190"><span class="elsevierStyleSup">38</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Cohort study&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">38697&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Lower risk of melanoma in former smokers compared with nonsmokers or current smokers&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Nagore et al&#46;<a class="elsevierStyleCrossRef" href="#bib0195"><span class="elsevierStyleSup">39</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Case-control study&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">160 patients with melanoma&#44; aged over 60 years&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Smoking habit is an independent risk factor in individuals aged over 60 years&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">318 controls&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Espinosa et al&#46;<a class="elsevierStyleCrossRef" href="#bib0200"><span class="elsevierStyleSup">40</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Cohort study&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">1200 patients with melanoma&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">No association was found between smoking more than 20 packet-years as a risk factor for developing NMSC in patients with a history of melanoma&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
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        "tipo" => "MULTIMEDIATABLA"
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            "identificador" => "at0015"
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        "tabla" => array:1 [
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            0 => array:2 [
              "tabla" => array:1 [
                0 => """
                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Reference&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Diet and Nutrients&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Type of Study&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">No&#46; of Individuals&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Findings of Association with Diet&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Ruan et al&#46;<a class="elsevierStyleCrossRef" href="#bib0240"><span class="elsevierStyleSup">48</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Total and saturated fats&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Metaanalysis &#40;3 cohort studies and 9 case-control studies&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">30915 BCC&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">No association between dietary intake of total and saturated fat and BCC&#44; SCC&#44; and melanoma&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">4106 SCC&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">High monounsaturated fat intake was associated with a decrease in risk of BCC &#40;RR&#44; 0&#46;90&#59; 95&#37; CI&#44; 0&#46;85&#8211;0&#46;96&#41;&#46; High polyunsaturated fat intake was positively associated with risk of SCC &#40;RR&#44; 1&#46;19&#44; 95&#37; CI&#44; 1&#46;06&#8211;1&#46;33&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">1638 melanomas&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Kune et al&#46;<a class="elsevierStyleCrossRef" href="#bib0245"><span class="elsevierStyleSup">49</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Vitamin A and &#946;-carotene&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Case-control study&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">176 &#40;88 cases and 88 controls&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Inverse association with NMSC &#40;BCC and SCC&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Cases also had lower serum levels of &#946;-carotene and vitamin A than controls&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Wei et al&#46;<a class="elsevierStyleCrossRef" href="#bib0250"><span class="elsevierStyleSup">50</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Folic acid&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Clinical trial&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">958&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Supplementation with folic acid was not associated with BCC incidence&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Fung et al&#46;<a class="elsevierStyleCrossRef" href="#bib0255"><span class="elsevierStyleSup">51</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Vitamins A&#44; C and E and folates&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Clinical trial&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">5392&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">There was no evidence that vitamins A&#44; C and E and folates play a substantial protective role in the incidence of BCC&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Karagas et al&#46;<a class="elsevierStyleCrossRef" href="#bib0260"><span class="elsevierStyleSup">52</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Selenium&#44; &#945;-tocopherol&#44; &#946;-carotene&#44; and retinol&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Case-control studies&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">396 &#40;132 cases and 264 controls&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">At the concentrations studied&#44; there was no relationship with the risk of SCC&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Frieling et al&#46;<a class="elsevierStyleCrossRef" href="#bib0265"><span class="elsevierStyleSup">53</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#946;-carotene&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Clinical trial&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">22071&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Supplementation with &#946;-carotene for an average of 12 years did not impact the risk of BCC or SCC&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Green et al&#46;<a class="elsevierStyleCrossRef" href="#bib0270"><span class="elsevierStyleSup">54</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#946;-carotene&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Clinical trial&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">1383&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Supplementation with &#946;-carotenes was not associated with a change in the risk of either SCC or BCC&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Greenberg et al&#46;<a class="elsevierStyleCrossRef" href="#bib0275"><span class="elsevierStyleSup">55</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#946;-carotene&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Clinical trial&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">1805&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Supplementation with &#946;-carotenes in individuals with NMSC did not reduce development of new NMSC&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Moon et al&#46;<a class="elsevierStyleCrossRef" href="#bib0280"><span class="elsevierStyleSup">56</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Oral supplementation with retinol&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Clinical trial&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">2297&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Daily supplementation with 25000 IU of retinol was effective for preventing SCC&#44; although it did not prevent BCC in patients with moderate risk&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Tang et al&#46;<a class="elsevierStyleCrossRef" href="#bib0290"><span class="elsevierStyleSup">58</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Vitamin D&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Case-control study&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">178 cases 930 controls&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Inverse relationship between serum levels and NMSC&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Moreno-Arrones et al&#46;<a class="elsevierStyleCrossRef" href="#bib0300"><span class="elsevierStyleSup">60</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Vitamin D&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Longitudinal study&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">204 melanomas&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Significant association between VD levels on diagnosis and site&#44; mitotic index of the tumor&#44; and ulceration&#59; a borderline association with Breslow depth and BMI&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Duffield-Lillico et al&#46;<a class="elsevierStyleCrossRef" href="#bib0305"><span class="elsevierStyleSup">61</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Selenium supplements&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Clinical trial&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">1312&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Daily supplementation with 200&#8239;&#956;g daily of selenium does not reduce the risk of BCC and increases the risk of SCC in patients with a history of NMSC&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Dhana et al&#46;<a class="elsevierStyleCrossRef" href="#bib0310"><span class="elsevierStyleSup">62</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Dietry folic acid&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Cohort study&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">75311 women and 48523 men&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Moderate increase in the risk of melanoma with folate intake derived solely from diet&#46; A higher intake of vitamins B6 and B12&#44; choline&#44; betaine&#44; and methionine was not associated with risk of melanoma&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Gossai et al&#46;<a class="elsevierStyleCrossRef" href="#bib0320"><span class="elsevierStyleSup">64</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Rice &#40;arsenic content&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Case-control study&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">487 cases 462 controls&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Rice consumption may be related to onset of keratinocytic tumors&#44; in those individuals with relatively low exposure to arsenic in drinking water&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Donat-Vargas C et al&#46;<a class="elsevierStyleCrossRef" href="#bib0330"><span class="elsevierStyleSup">66</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Polychlorinated biphenyls &#40;PCB&#41; and &#963;-3 polyunsaturated fatty acids &#40;in fatty fishes in diet&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Cohort study&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">20785 Swedish women&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">A direct association was found between exposure to PCB in diet and risk of melanoma&#46; Intake of &#963;-3 polyunsaturated fatty acids was shown to have a substantial protective association&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Mahamat-Saleh et al&#46;<a class="elsevierStyleCrossRef" href="#bib0335"><span class="elsevierStyleSup">67</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Mediterranean diet&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Cohort study&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">98995 French women&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Adherence to a Mediterranean diet is associated with a lower risk of skin cancer in women&#44; particularly melanoma and BCC&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Liu et al&#46;<a class="elsevierStyleCrossRef" href="#bib0340"><span class="elsevierStyleSup">68</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Caffeinated coffee&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Metaanalysis &#40;2 case-control studies and 5 cohort studies&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">851672&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Caffeinated coffee has chemopreventive effects&#46; One cup of coffee daily reduces the risk of melanoma by 3&#37;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Vasegui et al&#46;<a class="elsevierStyleCrossRef" href="#bib0345"><span class="elsevierStyleSup">69</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Caffeinated coffee&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Metaanalysis &#40;2 case-control studies&#44; 4 cohort studies&#44; and 1 longitudinal study&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">320370 controls and 104770 cases&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Caffeinated coffee reduces the risk of BCC in dose-dependent fashion&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
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          "en" => "<p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">Epidemiological Studies of the Association Between Skin Cancer and Diet and Nutrients&#46;</p>"
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Review
Influence of the Exposome on Skin Cancer
La influencia del exposoma en el cáncer de piel
T. Gracia-Cazañaa,e,
Corresponding author
tamgracaz@gmail.com

Corresponding author.
, S. Gonzálezb,e, C. Parradoc,e, Á. Juarranzc, Y. Gilaberted,e
a Unidad de Dermatología. Hospital de Barbastro, Huesca, Spain
b Departamento de Medicina y Especialidades Médicas, Instituto Ramón y Cajal de Investigación Sanitaria, Universidad de Alcalá Madrid, Madrid, Spain
c Departamento de Histología y Patología, Universidad de Málaga, Málaga, Spain
d Departamento de Biología, Instituto Ramón y Cajal de Investigación Sanitaria, Universidad Autónoma de Madrid, Madrid, Spain
e Servicio de Dermatología, Hospital Miguel Servet, Zaragoza, Spain
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          "en" => "<p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">Environmental exposure of an individual during his or her life&#44; habits&#44; and lifestyle&#44; that may influence the onset of skin cancer&#46;</p>"
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    "textoCompleto" => "<span class="elsevierStyleSections"><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0025">Introduction</span><p id="par0005" class="elsevierStylePara elsevierViewall">The concept of exposome refers to the totality of environmental exposures that individuals experience during their lives and underlies a new approach to study of the role of the environment in human health&#46;<a class="elsevierStyleCrossRef" href="#bib0005"><span class="elsevierStyleSup">1</span></a> Linked to this concept&#44; the EXPOsOMICs project has the aim of assessing environmental exposures&#44; mainly environmental pollution and water contaminants&#44; using <span class="elsevierStyleItalic">omic</span> technologies that can look for associations between exposure data and biochemical and molecular changes&#46; The results will enhance our understanding of how contaminants influence the risk of developing both chronic diseases and different types of cancer&#46;<a class="elsevierStyleCrossRef" href="#bib0010"><span class="elsevierStyleSup">2</span></a></p><p id="par0010" class="elsevierStylePara elsevierViewall">Skin cancer is the most frequent type of cancer in humans&#46; As the skin is our most external organ and&#44; therefore&#44; the one in closest contact with the environment&#44; it is doubtlessly the most exposed to the effects of what is going on in our surroundings&#46; Of all possible types of exposure&#44; ultraviolet &#40;UV&#41; radiation from sunlight has been recognized as the primary causal agent of skin cancer&#46;<a class="elsevierStyleCrossRef" href="#bib0015"><span class="elsevierStyleSup">3</span></a> However&#44; in recent years&#44; there is mounting evidence that air pollution&#44; contaminants in water and food&#44; and lifestyle can also influence development of the cancer&#46; In a holistic concept of health&#44; and taking into account the interaction between the psyche and nervous&#44; endocrine&#44; and immune systems&#44; it is increasingly necessary to consider the influence of stress or sleep on the onset of cancer&#46;</p><p id="par0015" class="elsevierStylePara elsevierViewall">The present article aims to review available evidence on those external factors related to the onset of skin cancer of any type &#40;<a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>&#41;&#46;</p><elsevierMultimedia ident="fig0005"></elsevierMultimedia></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0030">Radiation</span><p id="par0020" class="elsevierStylePara elsevierViewall">UV radiation&#44; particularly in individuals with fair skin&#44; is the main cause of skin cancer&#44; particularly keratinocyte skin cancer and melanoma&#46;</p><p id="par0025" class="elsevierStylePara elsevierViewall">Both type B UV &#40;UVB&#41; and type B &#40;UVA&#41; radiation are considered as human carcinogens&#46;<a class="elsevierStyleCrossRef" href="#bib0015"><span class="elsevierStyleSup">3</span></a> It is known that UV radiation participates in the onset of cancer&#44; as UVB radiation induces direct DNA damage that gives rise to the formation of thymine dimers&#59; UVA also induces direct and indirect DNA damage through the production of reactive oxygen species &#40;ROS&#41; leading to simple or double-chain breaks and DNA-protein crosslinks&#44; and through oxidation to form 8-oxoguanine&#46;<a class="elsevierStyleCrossRef" href="#bib0020"><span class="elsevierStyleSup">4</span></a> This DNA damage induces p53 activation that can activate cell repair through nucleotide excision or drive the cell to apoptosis&#46;<a class="elsevierStyleCrossRef" href="#bib0025"><span class="elsevierStyleSup">5</span></a> If the <span class="elsevierStyleItalic">p53</span> gene undergoes a mutation due to UV radiation&#44; this process does not occur giving rise to clonal keratinocyte and melanocyte expansion with damaged DNA and to skin carcinogenesis&#46; Added to this&#44; UV radiation induces Langerhans cell depletion in the epidermis with the corresponding decreased skin immune surveillance and production of inflammatory cytokines&#44; a state that favors the development of skin cancer&#46;<a class="elsevierStyleCrossRef" href="#bib0030"><span class="elsevierStyleSup">6</span></a></p><p id="par0030" class="elsevierStylePara elsevierViewall">Epidemiological studies have shown that living in geographic areas with high levels of UV radiation is associated with an increased risk of skin cancer<a class="elsevierStyleCrossRef" href="#bib0035"><span class="elsevierStyleSup">7</span></a>&#59; squamous cell carcinoma &#40;SCC&#41; is more related to cumulative or occupational exposure whereas basal cell carcinoma &#40;BCC&#41; and melanoma appear more related to intense sporadic exposure and a history of sunburn&#46;<a class="elsevierStyleCrossRef" href="#bib0040"><span class="elsevierStyleSup">8</span></a></p><p id="par0035" class="elsevierStylePara elsevierViewall">The use of sunlamps increases the risk of developing both BCC and SCC proportionally with the extent of exposure&#44; when usage occurred during adolescence&#46;<a class="elsevierStyleCrossRef" href="#bib0045"><span class="elsevierStyleSup">9</span></a> The use of sunlamps has been associated with an increased risk of developing melanoma&#44; depending on the number of sessions and use at a young age &#40;&#60; 35 years&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0050"><span class="elsevierStyleSup">10</span></a></p><p id="par0040" class="elsevierStylePara elsevierViewall">Ionizing radiation has also been established as a cause of nonmelanoma skin cancer &#40;NMSC&#41;&#46; Thus&#44; occupational exposure in radiology technicians to low to moderate doses of radiation can increase the risk of BCC&#44; particularly in individuals with light-colored eyes and fair hair&#46;<a class="elsevierStyleCrossRef" href="#bib0055"><span class="elsevierStyleSup">11</span></a> An increased risk is also observed in those who undergo radiotherapy&#46;<a class="elsevierStyleCrossRef" href="#bib0060"><span class="elsevierStyleSup">12</span></a></p><p id="par0045" class="elsevierStylePara elsevierViewall">Cosmic radiation has been proposed as an agent that may induce melanoma and BCC in pilots and cabin crew&#46; This group has twice the incidence of melanoma compared with the general population and there is a relationship with the number of flight hours and therefore with cumulative radiation exposure&#46;<a class="elsevierStyleCrossRef" href="#bib0065"><span class="elsevierStyleSup">13</span></a> Nevertheless&#44; there is some doubt as to whether the lifestyle of this group of professionals may also have an effect&#46;<a class="elsevierStyleCrossRef" href="#bib0070"><span class="elsevierStyleSup">14</span></a></p><p id="par0050" class="elsevierStylePara elsevierViewall">Between 1950 and 2011&#44; an increase of 13&#37; was detected in erythematous radiation due to decreased ozone levels in 9 Spanish cities&#46;<a class="elsevierStyleCrossRef" href="#bib0075"><span class="elsevierStyleSup">15</span></a> The 1987 Montreal protocol banned the emission of chlorofluorocarbons leading to a decrease in the levels of these agents over the Antarctic&#44; with an associated decrease of 20&#37; in the resulting ozone depletion&#46;<a class="elsevierStyleCrossRef" href="#bib0080"><span class="elsevierStyleSup">16</span></a> This decrease without doubt can have repercussions for the amount of UVB radiation that we receive&#44; decreasing exposure and resulting&#44; perhaps in the future&#44; in a decrease in the incidence of skin cancer&#46;</p></span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0035">Temperature</span><p id="par0055" class="elsevierStylePara elsevierViewall">Heat can also be a risk factor for skin carcinogenesis&#46; In both cell cultures and experimental animals&#44; administration of repeat doses of UVB and heat &#40;39&#8239;&#176;<span class="elsevierStyleSmallCaps">C</span>&#41; reduces apoptosis&#44; deactivating p53-mediated response to stress and inducing expression of sirtuin 1 &#40;SIRT1&#41;&#46; Therefore&#44; both environmental factors act synergistically to allow the survival of cells with damaged DNA&#46;<a class="elsevierStyleCrossRef" href="#bib0085"><span class="elsevierStyleSup">17</span></a></p><p id="par0060" class="elsevierStylePara elsevierViewall">However&#44; this interaction is not clear cut&#46; A recent study has shown that if nude mice are first exposed to heat and then to UVB radiation&#44; tumor onset is delayed and&#44; in addition&#44; the tumors that developed were smaller than those in mice treated only with UVB or with UVB followed by heat&#46;<a class="elsevierStyleCrossRef" href="#bib0090"><span class="elsevierStyleSup">18</span></a></p></span><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0040">Pollution</span><p id="par0065" class="elsevierStylePara elsevierViewall">It is estimated that air pollution is responsible for approximately 7 million deaths worldwide every year&#46;<a class="elsevierStyleCrossRef" href="#bib0095"><span class="elsevierStyleSup">19</span></a> Its association with lung cancer is clear&#59; however&#44; its association with other cancers&#44; such as skin cancer&#44; has not been established&#46;</p><p id="par0070" class="elsevierStylePara elsevierViewall">The main air pollutants are polycyclic aromatic hydrocarbons &#40;PAHs&#41; &#40;including benzopyrenes&#41;&#44; which are derived mainly from automobile combustion and combustion of organic materials&#44; including cigarettes&#46; PAHs are the causal agents of scrotum cancer&#46;<a class="elsevierStyleCrossRef" href="#bib0100"><span class="elsevierStyleSup">20</span></a> In terms of the skin&#44; it has been shown that applying a mixture of PAHs chronically to the skin of nude mice induces papilloma and SCC formation&#44;<a class="elsevierStyleCrossRef" href="#bib0105"><span class="elsevierStyleSup">21</span></a> whereas 7&#44;12-dimethylbenzanthracene is able to induce lymphomas in hamsters&#46;<a class="elsevierStyleCrossRef" href="#bib0110"><span class="elsevierStyleSup">22</span></a></p><p id="par0075" class="elsevierStylePara elsevierViewall">Particulate material &#40;PM&#41; suspended in the atmosphere&#44; formed of a complex mixture of solid particles and liquid drops&#44; are of prime importance as harmful agents for the skin&#46; These are able to penetrate the follicles or enter the skin via a transdermal route&#46;<a class="elsevierStyleCrossRef" href="#bib0115"><span class="elsevierStyleSup">23</span></a> PM stimulates the production of ROS&#44; such as the superoxide anion or hydroxyl radical&#44; and favors the secretion of proinflammatory cytokines such as tumor necrosis factor&#44; interleukin &#40;IL&#41; 1a&#44; and IL-8&#46; Moreover&#44; these agents increase the presence of metalloproteinases &#40;MMP&#41; &#40;MMP-1&#44; MMP-2&#44; and MMP-9&#41;&#44; inducing collagen degradation and&#44; as a result&#44; photoaging&#46;<a class="elsevierStyleCrossRef" href="#bib0120"><span class="elsevierStyleSup">24</span></a></p><p id="par0080" class="elsevierStylePara elsevierViewall">Ultrafine particles are those that measure less than 100&#8239;nm in diameter and have greater harmful potential for health than PM&#46; These include carbon black and PAHs&#44; both associated with skin cancer&#46;<a class="elsevierStyleCrossRef" href="#bib0125"><span class="elsevierStyleSup">25</span></a> There is evidence of an increase in the incidence of melanoma&#44; but not NMSC&#44; in workers exposed to carbon black&#46;<a class="elsevierStyleCrossRef" href="#bib0130"><span class="elsevierStyleSup">26</span></a></p><p id="par0085" class="elsevierStylePara elsevierViewall">Nevertheless&#44; pollution can also contribute to a reduction in the amount of UV radiation that reaches the surface of the earth&#46; Thus&#44; decreases of up to 50&#37; are seen in UVB radiation levels on days of high pollution&#46; However&#44; UVA radiation is not attenuated by pollution&#44; and so the ratio of UVB&#47;UVA that reaches the earth&#8217;s surface may be impacted&#44; and the effects of this change are as yet unknown&#46;<a class="elsevierStyleCrossRef" href="#bib0095"><span class="elsevierStyleSup">19</span></a></p><p id="par0090" class="elsevierStylePara elsevierViewall">Moreover&#44; all agents that we are exposed to can interract to produce synergistic or antagonistic effects&#46; UV radiation in combination with PAHs increases photodamage to the skin&#44;<a class="elsevierStyleCrossRef" href="#bib0135"><span class="elsevierStyleSup">27</span></a> while UVA radiation increases the carcinogenic activity of benzopyrenes&#46;<a class="elsevierStyleCrossRef" href="#bib0140"><span class="elsevierStyleSup">28</span></a> Furthermore&#44; the microbiota of the skin&#44; and micrococci in particular&#44; may degrade benzopyrenes&#44; and as such they would constitute an innate defence mechanism against PAHs&#46;<a class="elsevierStyleCrossRef" href="#bib0145"><span class="elsevierStyleSup">29</span></a></p><p id="par0095" class="elsevierStylePara elsevierViewall">The most relevant epidemiological study to investigate the relationship between pollution and skin cancer was conducted in Saxony&#59; the study assessed the incidence of skin cancer between 2010 and 2014 in approximately 2 million individuals and found a relationship with existing pollution&#46;<a class="elsevierStyleCrossRef" href="#bib0150"><span class="elsevierStyleSup">30</span></a> In particular&#44; the authors found an association between PM10 &#40;10&#8239;&#181;g&#47;m<a class="elsevierStyleCrossRef" href="#bib0015"><span class="elsevierStyleSup">3</span></a>&#41; and NO<span class="elsevierStyleInf">2</span> and an increase in the relative risk of NMSC of 52&#37; and 7&#37; to 24&#37;&#44; respectively&#46; In contrast&#44; in this study&#44; a protective effect of green areas was found&#44; as an increase in 10&#37; of such areas reduced the relative risk of NMSC by 16&#37;&#46; One limitation of this study was that socioeconomic level and smoking habit were not taken into consideration&#46;<a class="elsevierStyleCrossRef" href="#bib0150"><span class="elsevierStyleSup">30</span></a></p></span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0045">Pesticides</span><p id="par0100" class="elsevierStylePara elsevierViewall">An increased exposure to pesticides has been shown to increase the risk of developing melanoma &#40;odds ratio &#91;OR&#93;&#44; 2&#46;1&#59; 95&#37; confidence interval &#91;CI&#93;&#44; 1-6&#46;9&#41;&#44; especially when exposed in an occupational setting &#40;OR&#44; 4&#46;23&#59; 95&#37; CI&#44; 1&#46;94-6&#46;31&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0155"><span class="elsevierStyleSup">31</span></a></p><p id="par0105" class="elsevierStylePara elsevierViewall">The AGRICAN Cohort study&#44; conducted in a cohort of 11 000 French agricultural workers followed for up to 6 years&#44; reported a significantly higher incidence of multiple myeloma in men and melanoma in women who had been exposed to pesticides&#46;<a class="elsevierStyleCrossRef" href="#bib0160"><span class="elsevierStyleSup">32</span></a></p><p id="par0110" class="elsevierStylePara elsevierViewall">Moreover&#44; a synergistic effect between exposure to pesticides and UV radiation has been demonstrated&#44; increasing the risk of melanoma with an OR increasing from 2&#46;6 &#40;95&#37; CI&#44; 1&#46;2-5&#46;6&#41; to 4&#46;7 &#40;95&#37; CI&#44; 1&#46;3-17&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0165"><span class="elsevierStyleSup">33</span></a></p><p id="par0115" class="elsevierStylePara elsevierViewall">Genetics has a modulating effect on these risk factors&#46; Certain polymorphisms in the glutathione S-transferase &#40;GST&#41; gene&#44; along with exposure to pesticides&#44; has been associated with a greater risk of cutaneous melanoma&#46; Likewise&#44; the unmutated <span class="elsevierStyleItalic">GSTM1</span> gene is a risk modifier for cutaneous melanoma in patients exposed to pesticides with an OR of 2&#46;8 &#40;95&#37; CI&#44; 1&#46;1-7&#46;1&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0170"><span class="elsevierStyleSup">34</span></a></p></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0050">Smoking Habit</span><p id="par0120" class="elsevierStylePara elsevierViewall">Epidemiological studies published on the risk of skin cancer in smokers have yielded contradictory results &#40;<a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a>&#41;&#46;<a class="elsevierStyleCrossRefs" href="#bib0175"><span class="elsevierStyleSup">35&#8211;40</span></a></p><elsevierMultimedia ident="tbl0005"></elsevierMultimedia><p id="par0125" class="elsevierStylePara elsevierViewall">In terms of genetics&#44; some single nucleotide polymorphisms in the <span class="elsevierStyleItalic">CHRNA5-A3-B4</span> gene have been associated with smoking and play a role in the development of melanoma&#46;<a class="elsevierStyleCrossRef" href="#bib0205"><span class="elsevierStyleSup">41</span></a> Furthermore&#44; 2 polymorphisms in the vitamin D receptor gene &#40;<span class="elsevierStyleItalic">BsmI-rs1544410</span> and <span class="elsevierStyleItalic">FokI-rs2228570</span>&#41; have been linked to susceptibility to obesity&#44; duration of smoking habit&#44; and severity of melanoma&#46;<a class="elsevierStyleCrossRef" href="#bib0210"><span class="elsevierStyleSup">42</span></a></p><p id="par0130" class="elsevierStylePara elsevierViewall">Experimental animal studies have shown that exposure to UV radiation and cigarette smoke has a synergistic effect for inducing SCC in mice&#46;<a class="elsevierStyleCrossRef" href="#bib0215"><span class="elsevierStyleSup">43</span></a></p><p id="par0135" class="elsevierStylePara elsevierViewall">Pathogenesis is established because cigarette smoke increases epidermal proliferation and induces ROS that oxidize DNA in fibroblasts&#46; Furthermore&#44; the affected fibroblasts induce the secretion of IL1&#945;&#44; IL-6&#44; IL-8&#44; basic fibroblast growth factor &#40;FGF&#41;&#44; monocyte chemotactic protein &#40;MCP&#41; 1&#44; and insulin growth factor type 4 &#40;IGFBP4&#41;&#44; which stimulate the proliferation of keratinocytes&#44; thereby favoring carcinogenesis in skin thorugh regulation of cell proliferation&#46; Acute oxidative stress compromises the DNA repair systems&#44; increasing the repair intervals and increases damage in the DNA in groups of smokers&#46;<a class="elsevierStyleCrossRefs" href="#bib0220"><span class="elsevierStyleSup">44&#44;45</span></a></p><p id="par0140" class="elsevierStylePara elsevierViewall">Finally&#44; it has been observed that smoking is a modifiable risk factor for the onset of other extracutaneous neoplasms in patients with a personal history of NMSC or melanoma&#46;<a class="elsevierStyleCrossRef" href="#bib0230"><span class="elsevierStyleSup">46</span></a></p></span><span id="sec0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0055">Diet</span><p id="par0145" class="elsevierStylePara elsevierViewall">The effect of diet on different dermatoses and neoplasms is a topic subject to debate&#46;<a class="elsevierStyleCrossRef" href="#bib0235"><span class="elsevierStyleSup">47</span></a>&#44;48</p><p id="par0150" class="elsevierStylePara elsevierViewall">With respect to vitamin intake&#44; studies have found an inverse relationship between serum levels of vitamin A &#40;retinol&#41; and its derivative &#946;-carotene with developing NMSC&#44;<a class="elsevierStyleCrossRefs" href="#bib0245"><span class="elsevierStyleSup">49&#44;50</span></a> whereas others have found the opposite&#46;<a class="elsevierStyleCrossRefs" href="#bib0255"><span class="elsevierStyleSup">51&#44;52</span></a> Clinical trials have assessed the effect of oral retinol supplements on the prevention of skin cancer and&#44; although most have not found a protective effect&#44;<a class="elsevierStyleCrossRefs" href="#bib0265"><span class="elsevierStyleSup">53&#8211;55</span></a> it appears that the risk of SCC is reduced in patients with a moderate initial risk&#46;<a class="elsevierStyleCrossRef" href="#bib0280"><span class="elsevierStyleSup">56</span></a></p><p id="par0155" class="elsevierStylePara elsevierViewall">Loss of the vitamin D &#40;VD&#41; receptor increases susceptibility to UV-induced skin tumorigenesis in mice&#46;<a class="elsevierStyleCrossRef" href="#bib0285"><span class="elsevierStyleSup">57</span></a> However&#44; studies in humans support an inverse effect of VD levels on risk of NMSC&#46;<a class="elsevierStyleCrossRef" href="#bib0290"><span class="elsevierStyleSup">58</span></a> A confounding factor is sun exposure&#44; which is positively correlated with both serum VD levels and skin cancer&#46; The role of VD in epidemiological studies is not clear&#44; although several pathological and molecular studies have shown a correlation between VD deficit and progression and prognosis of melanoma&#46;<a class="elsevierStyleCrossRef" href="#bib0295"><span class="elsevierStyleSup">59</span></a> Recently&#44; in a study of 204 invasive melanomas&#44; the role of VD was assessed&#46; A significant association was found between VD levels on diagnosis and site&#44; mitotic index of the tumor&#44; and ulceration&#44; while a borderline association with Breslow depth and body mass index was also found&#44; suggesting a role for VD levels in determining the aggressiveness of melanoma&#46;<a class="elsevierStyleCrossRef" href="#bib0300"><span class="elsevierStyleSup">60</span></a></p><p id="par0160" class="elsevierStylePara elsevierViewall">Selenium&#44; a micromineral antioxidant&#44; was postulated as a supplement that could decrease the effects of UVB radiation on DNA&#59; however&#44; in a clinical trial that administered an oral daily selenium supplement &#40;200&#8239;&#956;g&#41; to patients with a history of 2 or more BCC or one or more SCC&#44; paradoxically&#44; the risk of SCC increased&#46;<a class="elsevierStyleCrossRef" href="#bib0305"><span class="elsevierStyleSup">61</span></a></p><p id="par0165" class="elsevierStylePara elsevierViewall">In a cohort study&#44; intake of folic acid in diet was associated with a moderate increase in the risk of cutaneous melanoma&#46;<a class="elsevierStyleCrossRef" href="#bib0310"><span class="elsevierStyleSup">62</span></a> However&#44; the scientific evidence is still insufficient and other factors related to folic acid intake in diet that could explain this association need to be considered&#46;<a class="elsevierStyleCrossRef" href="#bib0310"><span class="elsevierStyleSup">62</span></a></p><p id="par0170" class="elsevierStylePara elsevierViewall">Contaminants in diet are&#44; however&#44; a serious problem&#44; particularly when they involve the water supply&#46; Thus&#44; it has been demonstrated that certain water contaminants&#44; such as arsenic and polychlorinated biphenyls&#44; may cause skin cancer&#46; The WHO has established that there is a risk of skin cancer when the arsenic concentration in water exceeds 10&#8239;&#956;g&#47;L&#46;<a class="elsevierStyleCrossRef" href="#bib0315"><span class="elsevierStyleSup">63</span></a> The issue was highlighted by the observation that the risk for developing keratinocytic tumors was 1&#46;5-fold greater in any rice consumers compared with nonconsumers &#40;95&#37; CI&#44; 1&#46;1-2&#46;0&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0320"><span class="elsevierStyleSup">64</span></a> The reason why rice has the arsenic content it does is because it is a crop that requires abundant water and this&#44; depending on the geographic area&#44; may contain notable quantities of arsenic&#46; Thus&#44; a clear association has been documented between BCC and SQQ with arsenic concentrations &#8239;&#60;&#8239;100ug&#47;L in South Asia&#44; China&#44; Taiwan&#44; Mexico&#44; eastern Europe&#44; and the United States&#46;<a class="elsevierStyleCrossRef" href="#bib0315"><span class="elsevierStyleSup">63</span></a></p><p id="par0175" class="elsevierStylePara elsevierViewall">Furthermore&#44; the effect of arsenic is modified by genetic susceptibility&#44; as occurs in polymorphisms of the gene encoding the arsenic methyltransferase gene&#59; these polymorphisms decrease the capacity to metabolize arsenic&#46;<a class="elsevierStyleCrossRef" href="#bib0325"><span class="elsevierStyleSup">65</span></a></p><p id="par0180" class="elsevierStylePara elsevierViewall">Polychlorinated biphenyls &#40;PCPs&#41; are extensively distributed in the environment&#44; whether through direct dumping by industries that use them or through combustion and dumping in rivers and marine waters of contaminated waste&#46; Fatty fish can contain significant quantities of polychlorinated biphenyls&#44; which impact melanogenesis and facilitate melanoma progression&#46; In contrast&#44; these fish are also rich in &#963;-3 polyunsaturated fatty acids&#44; which have an antineoplastic action on melanoma&#46; A cohort study found a hazard ratio &#40;HR&#41; of 4 &#40;95&#37; CI&#44; 1&#46;2-1&#46;3&#44; <span class="elsevierStyleItalic">P</span>&#8239;&#61;&#8239;&#46;02&#41; associated with PCBs&#44; whereas for the relationship with eicosapentaenoic&#47;docosahexaenoic acid intake&#44; the HR was 0&#46;2 &#40;95&#37; CI&#44; 0&#46;1-0&#46;8&#44; <span class="elsevierStyleItalic">P</span>&#8239;&#61;&#8239;&#46;003&#41;&#46; Therefore&#44; more studies are needed to really demonstrate whether consumption of this fish has a protective effect or may increase the risk of melanoma&#46;<a class="elsevierStyleCrossRef" href="#bib0330"><span class="elsevierStyleSup">66</span></a></p><p id="par0185" class="elsevierStylePara elsevierViewall">The association of Mediterranean diet with skin cancer has also been studied&#46; In French women&#44; closer adherence to this diet was associated with a reduction in the overall risk of developing skin cancer&#44; mainly through an inverse association with BCC incidence and a decrease in the risk of melanoma&#46; These results should also be confirmed in men and possible biases assessed&#44; but the results are sufficiently promising to be cited as an additional benefit when encouraging the Mediterranean diet in our patients&#46;<a class="elsevierStyleCrossRef" href="#bib0335"><span class="elsevierStyleSup">67</span></a></p><p id="par0190" class="elsevierStylePara elsevierViewall">Coffee and caffeine consumption is inversely and proportionally related to the risk of melanoma in several studies&#46; Specifically&#44; consumption of a cup of coffee a day decreased the risk of melanoma by 3&#37;&#46;<a class="elsevierStyleCrossRef" href="#bib0340"><span class="elsevierStyleSup">68</span></a> In contrast&#44; a metaanalysis found a dose-dependent relationship between caffeinated coffee consumption and incidence of BCC&#46;<a class="elsevierStyleCrossRef" href="#bib0345"><span class="elsevierStyleSup">69</span></a></p><p id="par0195" class="elsevierStylePara elsevierViewall">Finally&#44; dietary restriction alters both diurnal sensitivity to DNA damage caused by UVB radiation and expression of the <span class="elsevierStyleItalic">XPA</span> gene&#44; which is essential for DNA repair&#44; demonstrating the link between circadian rhythm&#44; food intake&#44; and skin health&#46;<a class="elsevierStyleCrossRef" href="#bib0350"><span class="elsevierStyleSup">70</span></a> All these studies conducted in humans that link diet with risk or not of developing skin cancer are summarized in <a class="elsevierStyleCrossRef" href="#tbl0010">Table 2</a>&#46;<a class="elsevierStyleCrossRefs" href="#bib0240"><span class="elsevierStyleSup">48&#44;58&#44;60&#8211;64&#44;66&#8211;69</span></a></p><elsevierMultimedia ident="tbl0010"></elsevierMultimedia></span><span id="sec0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0060">Physical Activity</span><p id="par0200" class="elsevierStylePara elsevierViewall">Numerous epidemiological studies have examined the relationship between physical activity and risk of NMSC and melanoma&#46; Athletes who practice sports outdoors receive high doses of UV radiation due to the long hours of training and competition with high exposure to sunlight&#44; and this effect increases in alpine sports due to the increase in UV radiation at altitude and reflection from surfaces coated with snow and ice&#46;<a class="elsevierStyleCrossRef" href="#bib0355"><span class="elsevierStyleSup">71</span></a> Thus&#44; extreme exposure to UV radiation in outdoor sports such as skiing&#44; mountain climbing&#44; or cycling or triathlon has been documented in a series of dosing studies&#46;<a class="elsevierStyleCrossRefs" href="#bib0360"><span class="elsevierStyleSup">72&#8211;75</span></a></p><p id="par0205" class="elsevierStylePara elsevierViewall">Extensive epidemiological studies show that recreational activities such as sunbathing on the beach or exposure during aquatic sports are associated with a greater risk of BCC&#44; whereas skiing has been shown to have a greater risk of SCC&#46;<a class="elsevierStyleCrossRefs" href="#bib0380"><span class="elsevierStyleSup">76&#8211;78</span></a> The incidence of BCC and SCC has been calculated in different groups of sports enthusiasts&#44; finding a greater risk of tumors in marathon runners&#44; an increased incidence of BCC in surfers&#44; and an increased prevalence of actinic keratosis in rock climbers&#46; However&#44; there are few studies&#44; the sample sizes are small&#44; and they do not include former sports player or retired athletes&#46;<a class="elsevierStyleCrossRefs" href="#bib0380"><span class="elsevierStyleSup">76&#44;77</span></a></p><p id="par0210" class="elsevierStylePara elsevierViewall">A metaanalysis that included 13949 patients who had recently been diagnosed with melanoma found that in cohort studies&#44; there is a greater risk of melanoma in patients with high physical activity &#40;relative risk&#8239;&#61;&#8239;1&#46;3&#59; 95&#37; CI&#8239;&#61;&#8239;1&#46;2-1&#46;4&#41;&#59; however&#44; this relationship was not shown in case-control studies&#44; probably because of confounding factors such as exposure to sunlight and phototype&#46;<a class="elsevierStyleCrossRef" href="#bib0395"><span class="elsevierStyleSup">79</span></a></p><p id="par0215" class="elsevierStylePara elsevierViewall">Some risk factors for cutaneous melanoma&#44; such as number of melanocytic nevi and solar lentigines&#44; are more frequent in individuals who practice sport outdoors&#46; In addition to substantial exposure to sunlight&#44; exercise-induced immunosuppression could increase the risk of NMSC and cutaneous melanoma in athletes&#46;<a class="elsevierStyleCrossRefs" href="#bib0390"><span class="elsevierStyleSup">78&#44;80</span></a></p><p id="par0220" class="elsevierStylePara elsevierViewall">However&#44; experimental studies suggest that exercise may have protective effects for skin cancer&#46; In <span class="elsevierStyleItalic">PTEN</span> knockout mice&#44; exercise prevents hepatocellular carcinoma and skin cancer induced by tetradecanoylphorbol-13-acetate &#40;TPA&#41; in an experimental animal model&#46;<a class="elsevierStyleCrossRef" href="#bib0405"><span class="elsevierStyleSup">81</span></a> Exercise stimulates secretion of circulating insulin growth factor &#40;IGF-1&#41; and the corresponding signal in TPA mice&#44; reducing the risk of skin cancer&#46; Furthermore&#44; exercise activates p53&#44; which increases p21&#44; IGFBP-3&#44; and PTEN&#44; in turn inducing down-regulation of the IGF-1 pathway&#44; contributing to prevention of skin cancer&#46;<a class="elsevierStyleCrossRefs" href="#bib0410"><span class="elsevierStyleSup">82&#8211;84</span></a></p><p id="par0225" class="elsevierStylePara elsevierViewall">In summary&#44; exercise may have a protective effect on skin cancer&#44; but not sufficient to compensate for the risk derived from excessive exposure UV radiation associated with outdoor sports&#59; probably the equilibrium is negatively influenced by inadequate photoprotection habits&#46; Therefore&#44; protective measures should be encouraged in those who practice outdoor sports&#46; Such measure include encouraging athletes to avoid training at times of maximum risk&#44; choosing appropriate clothing&#44; and applying water and sweat-resistant sunscreen&#46;<a class="elsevierStyleCrossRef" href="#bib0425"><span class="elsevierStyleSup">85</span></a></p></span><span id="sec0045" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0065">Circadian Rhythm</span><p id="par0230" class="elsevierStylePara elsevierViewall">Disruption of the circadian rhythm has been classified by the International Agency for Cancer Research as one of the most probable carcinogens based on the evidence from human and animal studies&#46;<a class="elsevierStyleCrossRef" href="#bib0430"><span class="elsevierStyleSup">86</span></a></p><p id="par0235" class="elsevierStylePara elsevierViewall">There is an increase in the standardized HR for melanoma in pilots &#40;2&#46;2 &#91;95&#37; CI&#44; 1&#46;7-2&#46;9&#93;&#41; and also in cabin crew in aircraft of 2&#46;1 &#40;95&#37; CI&#44; 1&#46;7-2&#46;9&#41;&#46; Penetration of UVA radiation through the windows is a plausible factor for pilots&#44; but not for the rest of the crew&#46; It has yet to be resolved whether the underlying cause for this observation is cosmic radiation&#44; lifestyles with more holidays with greater exposure to sunlight&#44; or disruption of the circadian rhythm&#46;<a class="elsevierStyleCrossRefs" href="#bib0435"><span class="elsevierStyleSup">87&#44;88</span></a></p><p id="par0240" class="elsevierStylePara elsevierViewall">Another group within the population who works shifts and has a higher incidence of melanoma are firemen&#59; in this group&#44; the results have been variable and the risk of melanoma is estimated to be 1&#46;3 &#40;95&#37; CI&#44; 1&#46;1-1&#46;6&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0445"><span class="elsevierStyleSup">89</span></a> Nevertheless&#44; it should be remembered that this group is exposed to potential carcinogenic compounds generated in fires&#44; such as PAHs&#44; which have been linked to NMSC&#46;<a class="elsevierStyleCrossRef" href="#bib0105"><span class="elsevierStyleSup">21</span></a></p><p id="par0245" class="elsevierStylePara elsevierViewall">In other shift workers such as nurses&#44; those who usually worked night shifts have an incidence of skin cancer 14&#37; lower than those who worked night shifts less regularly or never&#46;<a class="elsevierStyleCrossRef" href="#bib0450"><span class="elsevierStyleSup">90</span></a></p><p id="par0250" class="elsevierStylePara elsevierViewall">The influence of disruption to circadian rhythm on carcinogenesis is attributed to different possible mechanisms&#46; On one hand&#44; lower secretion of melatonin reduces anticarcinogenic and antioxidant acitivty<a class="elsevierStyleCrossRef" href="#bib0455"><span class="elsevierStyleSup">91</span></a>&#59; on the other&#44; there is a circadian regulation induced by UV radiation of certain DNA repair mechanisms&#44; as well as antioxidant cutaneous mechanisms&#46;<a class="elsevierStyleCrossRef" href="#bib0460"><span class="elsevierStyleSup">92</span></a> However&#44; the association with greater or lower incidence of skin cancer is not clear due to confounding factors&#44; such as decreased exposure to UV radiation due to working night shifts&#46;</p></span><span id="sec0050" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0070">Socioeconomic Status</span><p id="par0255" class="elsevierStylePara elsevierViewall">The impact of social and economic levels on cancer survival have been studied&#46; Economic inequalities in countries with limited healthcare access are responsible for worse melanoma prognosis because the tumor is diagnosed in more advanced stages&#46;<a class="elsevierStyleCrossRef" href="#bib0465"><span class="elsevierStyleSup">93</span></a> Thus&#44; a strong inverse correlation has been demonstrated between total healthcare spending per head and the ratio of melanoma incidence to the corresponding mortality &#40;r&#8239;&#61;&#8239;-0&#46;76&#44; <span class="elsevierStyleItalic">P</span>&#60;&#8239;&#46;05&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0470"><span class="elsevierStyleSup">94</span></a></p><p id="par0260" class="elsevierStylePara elsevierViewall">In Germany&#44; a study was conducted in 70 million inhabitants&#44; finding a direct correlation between a larger number of admissions and a lower level of education with a higher prevalence of melanoma and NMSC&#46;<a class="elsevierStyleCrossRef" href="#bib0475"><span class="elsevierStyleSup">95</span></a></p><p id="par0265" class="elsevierStylePara elsevierViewall">A multicenter study in 5 European countries &#40;France&#44; Germany&#44; Portugal&#44; Italy&#44; and Sweden&#41; found that there is a certain increment in the risk of skin cancer associated with greater socioeconomic level in middle-aged patients&#44; without any differences in older individuals&#46;<a class="elsevierStyleCrossRef" href="#bib0480"><span class="elsevierStyleSup">96</span></a></p></span><span id="sec0055" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0075">Microorganisms and Microbiota</span><p id="par0270" class="elsevierStylePara elsevierViewall">Certain microorganisms are known to play a role in some skin cancers&#44; in particular&#44; Merkel cell polyomavirus leading to Merkel cell carcinoma and human papillomaviurs&#46;<a class="elsevierStyleCrossRef" href="#bib0485"><span class="elsevierStyleSup">97</span></a> In the case of Merkel cell polyomavirus&#44; in a study of water analysis in Mediterranean countries&#44; this entity was found in 75&#37; of residual waters and in 29&#37; and 18&#37; of samples taken from rivers and the sea&#44; respectively&#46; The study affirms that water treatment and UV radiation eliminate between 2&#46;22 and 4&#46;52 log<span class="elsevierStyleInf">10</span> viral concentrations&#44; but global warming and limited rainfall could increase the presence of this virus and other water-born viruses&#46;<a class="elsevierStyleCrossRef" href="#bib0490"><span class="elsevierStyleSup">98</span></a></p><p id="par0275" class="elsevierStylePara elsevierViewall">It is known that <span class="elsevierStyleItalic">Propionibacterium acnes</span>&#44; one of the bacteria in our skin microbiota&#44; decreases synthesis of porphyrins on exposure to UVB radiation&#46;<a class="elsevierStyleCrossRef" href="#bib0495"><span class="elsevierStyleSup">99</span></a> UV radiation inhibits growth of <span class="elsevierStyleItalic">Malassezia furfur</span>&#44; a yeast in the microbiota that synthesizes pityriacitrin&#44; a substance with a photoprotective effect&#46;<a class="elsevierStyleCrossRef" href="#bib0500"><span class="elsevierStyleSup">100</span></a> Furthermore&#44; a relationship has been reported between development of melanoma and microorganisms of the <span class="elsevierStyleItalic">Fusobacterium</span> and <span class="elsevierStyleItalic">Trueperella</span> genera&#46;<a class="elsevierStyleCrossRef" href="#bib0505"><span class="elsevierStyleSup">101</span></a> On the other hand&#44; skin colonization of nude mice with a strain of <span class="elsevierStyleItalic">Staphylococcus epidermidis</span> from human microbiota that synthesizes 6-N-hydroxyaminopurine exercises a preventive role in the development of skin tumors in a model of photocarcinogenesis with UVB&#59; in contrast&#44; colonization by a strain of the same bacterium that does not produce 6-N-hydroxyaminopurine did not have any preventive effect&#46;<a class="elsevierStyleCrossRef" href="#bib0145"><span class="elsevierStyleSup">29</span></a> This could indicate that certain bacteria in the microbiota could lead to a protective effect or induce cancer when combined with UV radiation or sunlight&#46;</p><p id="par0280" class="elsevierStylePara elsevierViewall">But it is not just skin microbiota that might impact skin cancer&#46; Changes in the intestinal microbiota have been observed to bear a relationship with different responses to immunotherapy&#44; such that a greater diversity in intestinal microbiota and a greater growth of the <span class="elsevierStyleItalic">Ruminococcaceae</span> family favors response to immunotherapy with anti-PD-1 drugs&#46;<a class="elsevierStyleCrossRefs" href="#bib0510"><span class="elsevierStyleSup">102&#44;103</span></a></p></span><span id="sec0060" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0080">Conclusion</span><p id="par0285" class="elsevierStylePara elsevierViewall">This literature review shows that not only known factors such as UV and electromagnetic radiation but also factors such as environmental pollution&#44; including air pollution&#44; smoking&#44; and water contamination&#44; may have an impact on skin health and cancer genesis&#46; Some data are still contradictory or inconclusive&#44; and individual susceptibility&#44; determined by the genome itself&#44; along with perhaps other genes that cohabit with us&#44; in the microbiome&#44; should be taken into account&#46;</p></span></span>"
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            0 => "Exposoma"
            1 => "C&#225;ncer de piel"
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        "resumen" => "<span id="abst0005" class="elsevierStyleSection elsevierViewall"><p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">Skin cancer is the most frequent type of cancer in humans&#46; While exposure to solar radiation is the most widely known and relevant causal factor&#44; the different degrees of individual risk have not been fully elucidated&#46; Epidemiological studies show how the risk of skin cancer is affected by other types of radiation&#44; &#40;eg&#44; ionizing radiation&#41;&#44; pesticides&#44; particulate matter in air pollution&#44; toxins &#40;eg&#44; arsenic&#41; in water and some foods&#46; Some living entities&#44; such as polyomavirus and human papillomavirus&#44; can also cause specific types of cancer&#46; Lastly&#44; lifestyle factors such as stress&#44; sleep&#44; and exercise may play a role&#44; although only a few studies shed light on these factors&#46; The abovementioned factors make up the exposome of skin cancer&#44; that is&#44; the set of environmental exposures that&#44; together with the genome and microbiome&#44; determine the onset of disease&#46;</p></span>"
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        "resumen" => "<span id="abst0010" class="elsevierStyleSection elsevierViewall"><p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">El c&#225;ncer de piel es el m&#225;s frecuente del ser humano&#46; Aunque la exposici&#243;n a la radiaci&#243;n solar constituye el factor causal m&#225;s conocido y relevante&#44; existe una variaci&#243;n en el riesgo individual no explicada completamente&#46; Diferentes estudios epidemiol&#243;gicos muestran la influencia de otras radiaciones&#44; como las ionizantes&#44; los pesticidas&#44; las part&#237;culas de la poluci&#243;n&#44; o los t&#243;xicos contenidos en el agua o algunos alimentos como el ars&#233;nico&#44; en el riesgo del c&#225;ncer de piel&#46; Adem&#225;s&#44; algunos agentes vivos como los poliomavirus o el VPH son agentes etiol&#243;gicos de algunos tipos concretos de c&#225;ncer cut&#225;neo&#46; Por &#250;ltimo&#44; algunos factores asociados al estilo de vida&#44; como el estr&#233;s&#44; el sue&#241;o&#44; o el ejercicio podr&#237;an influir&#44; aunque son muy escasos los estudios que aporten luz en estas &#225;reas&#46; Todo ello constituye el exposoma del c&#225;ncer cut&#225;neo&#44; el conjunto de exposiciones ambientales de un ser humano a lo largo de la vida que&#44; combinados con el genoma y el microbioma&#44; determinan la aparici&#243;n del mismo&#46;</p></span>"
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        "nota" => "<p class="elsevierStyleNotepara" id="npar0005">Please cite this article as&#58; Gonz&#225;lez S&#44; Parrado C&#44; Gilaberte Y&#46; La influencia del exposoma en el c&#225;ncer de piel&#46; Actas Dermosifiliogr&#46; 2020&#59;111&#58;460&#8211;470&#46;</p>"
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          "en" => "<p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">Environmental exposure of an individual during his or her life&#44; habits&#44; and lifestyle&#44; that may influence the onset of skin cancer&#46;</p>"
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                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Reference&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Type of Study&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Number of Individuals&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Results of Association With Smoking Habit&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Thompson et al&#46;<a class="elsevierStyleCrossRef" href="#bib0175"><span class="elsevierStyleSup">35</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Metaanalysis &#40;6 cohort studies and 8 case-control studies&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">738661&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Increased risk of head and neck melanoma&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Song et al&#46;<a class="elsevierStyleCrossRef" href="#bib0180"><span class="elsevierStyleSup">36</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Metaanalyses and cohort study&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">145709&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">No association with risk of SCC was found&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">An inverse relationship with the onset of melanoma and BCC was found&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Jones et al&#46;<a class="elsevierStyleCrossRef" href="#bib0185"><span class="elsevierStyleSup">37</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Cohort study&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">4231&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Correlation with the appearance of lymphatic metastasis&#44; independently of the correlation with tumor thickness and ulceration&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Dusingize et al&#46;<a class="elsevierStyleCrossRef" href="#bib0190"><span class="elsevierStyleSup">38</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Cohort study&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">38697&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Lower risk of melanoma in former smokers compared with nonsmokers or current smokers&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Nagore et al&#46;<a class="elsevierStyleCrossRef" href="#bib0195"><span class="elsevierStyleSup">39</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Case-control study&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">160 patients with melanoma&#44; aged over 60 years&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Smoking habit is an independent risk factor in individuals aged over 60 years&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">318 controls&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Espinosa et al&#46;<a class="elsevierStyleCrossRef" href="#bib0200"><span class="elsevierStyleSup">40</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Cohort study&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">1200 patients with melanoma&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">No association was found between smoking more than 20 packet-years as a risk factor for developing NMSC in patients with a history of melanoma&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
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                0 => """
                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Reference&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Diet and Nutrients&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Type of Study&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">No&#46; of Individuals&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">Findings of Association with Diet&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Ruan et al&#46;<a class="elsevierStyleCrossRef" href="#bib0240"><span class="elsevierStyleSup">48</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Total and saturated fats&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Metaanalysis &#40;3 cohort studies and 9 case-control studies&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">30915 BCC&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">No association between dietary intake of total and saturated fat and BCC&#44; SCC&#44; and melanoma&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">4106 SCC&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">High monounsaturated fat intake was associated with a decrease in risk of BCC &#40;RR&#44; 0&#46;90&#59; 95&#37; CI&#44; 0&#46;85&#8211;0&#46;96&#41;&#46; High polyunsaturated fat intake was positively associated with risk of SCC &#40;RR&#44; 1&#46;19&#44; 95&#37; CI&#44; 1&#46;06&#8211;1&#46;33&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">1638 melanomas&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Kune et al&#46;<a class="elsevierStyleCrossRef" href="#bib0245"><span class="elsevierStyleSup">49</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Vitamin A and &#946;-carotene&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Case-control study&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">176 &#40;88 cases and 88 controls&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Inverse association with NMSC &#40;BCC and SCC&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Cases also had lower serum levels of &#946;-carotene and vitamin A than controls&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Wei et al&#46;<a class="elsevierStyleCrossRef" href="#bib0250"><span class="elsevierStyleSup">50</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Folic acid&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Clinical trial&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">958&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Supplementation with folic acid was not associated with BCC incidence&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Fung et al&#46;<a class="elsevierStyleCrossRef" href="#bib0255"><span class="elsevierStyleSup">51</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Vitamins A&#44; C and E and folates&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Clinical trial&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">5392&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">There was no evidence that vitamins A&#44; C and E and folates play a substantial protective role in the incidence of BCC&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Karagas et al&#46;<a class="elsevierStyleCrossRef" href="#bib0260"><span class="elsevierStyleSup">52</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Selenium&#44; &#945;-tocopherol&#44; &#946;-carotene&#44; and retinol&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Case-control studies&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">396 &#40;132 cases and 264 controls&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">At the concentrations studied&#44; there was no relationship with the risk of SCC&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Frieling et al&#46;<a class="elsevierStyleCrossRef" href="#bib0265"><span class="elsevierStyleSup">53</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#946;-carotene&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Clinical trial&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">22071&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Supplementation with &#946;-carotene for an average of 12 years did not impact the risk of BCC or SCC&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Green et al&#46;<a class="elsevierStyleCrossRef" href="#bib0270"><span class="elsevierStyleSup">54</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#946;-carotene&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Clinical trial&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">1383&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Supplementation with &#946;-carotenes was not associated with a change in the risk of either SCC or BCC&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Greenberg et al&#46;<a class="elsevierStyleCrossRef" href="#bib0275"><span class="elsevierStyleSup">55</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&#946;-carotene&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Clinical trial&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">1805&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Supplementation with &#946;-carotenes in individuals with NMSC did not reduce development of new NMSC&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Moon et al&#46;<a class="elsevierStyleCrossRef" href="#bib0280"><span class="elsevierStyleSup">56</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Oral supplementation with retinol&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Clinical trial&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">2297&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Daily supplementation with 25000 IU of retinol was effective for preventing SCC&#44; although it did not prevent BCC in patients with moderate risk&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Tang et al&#46;<a class="elsevierStyleCrossRef" href="#bib0290"><span class="elsevierStyleSup">58</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Vitamin D&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Case-control study&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">178 cases 930 controls&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Inverse relationship between serum levels and NMSC&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Moreno-Arrones et al&#46;<a class="elsevierStyleCrossRef" href="#bib0300"><span class="elsevierStyleSup">60</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Vitamin D&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Longitudinal study&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">204 melanomas&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Significant association between VD levels on diagnosis and site&#44; mitotic index of the tumor&#44; and ulceration&#59; a borderline association with Breslow depth and BMI&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Duffield-Lillico et al&#46;<a class="elsevierStyleCrossRef" href="#bib0305"><span class="elsevierStyleSup">61</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Selenium supplements&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Clinical trial&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">1312&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Daily supplementation with 200&#8239;&#956;g daily of selenium does not reduce the risk of BCC and increases the risk of SCC in patients with a history of NMSC&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Dhana et al&#46;<a class="elsevierStyleCrossRef" href="#bib0310"><span class="elsevierStyleSup">62</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Dietry folic acid&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Cohort study&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">75311 women and 48523 men&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Moderate increase in the risk of melanoma with folate intake derived solely from diet&#46; A higher intake of vitamins B6 and B12&#44; choline&#44; betaine&#44; and methionine was not associated with risk of melanoma&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Gossai et al&#46;<a class="elsevierStyleCrossRef" href="#bib0320"><span class="elsevierStyleSup">64</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Rice &#40;arsenic content&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Case-control study&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">487 cases 462 controls&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Rice consumption may be related to onset of keratinocytic tumors&#44; in those individuals with relatively low exposure to arsenic in drinking water&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Donat-Vargas C et al&#46;<a class="elsevierStyleCrossRef" href="#bib0330"><span class="elsevierStyleSup">66</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Polychlorinated biphenyls &#40;PCB&#41; and &#963;-3 polyunsaturated fatty acids &#40;in fatty fishes in diet&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Cohort study&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">20785 Swedish women&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">A direct association was found between exposure to PCB in diet and risk of melanoma&#46; Intake of &#963;-3 polyunsaturated fatty acids was shown to have a substantial protective association&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
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                  \t\t\t\t">Mahamat-Saleh et al&#46;<a class="elsevierStyleCrossRef" href="#bib0335"><span class="elsevierStyleSup">67</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">Mediterranean diet&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
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                  \t\t\t\t">Cohort study&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">98995 French women&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">Adherence to a Mediterranean diet is associated with a lower risk of skin cancer in women&#44; particularly melanoma and BCC&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
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                  \t\t\t\t">Liu et al&#46;<a class="elsevierStyleCrossRef" href="#bib0340"><span class="elsevierStyleSup">68</span></a>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
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                  \t\t\t\t">Caffeinated coffee&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
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                  \t\t\t\t">Metaanalysis &#40;2 case-control studies and 5 cohort studies&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">851672&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">Caffeinated coffee has chemopreventive effects&#46; One cup of coffee daily reduces the risk of melanoma by 3&#37;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
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                  \t\t\t\t">Vasegui et al&#46;<a class="elsevierStyleCrossRef" href="#bib0345"><span class="elsevierStyleSup">69</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">Caffeinated coffee&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">Metaanalysis &#40;2 case-control studies&#44; 4 cohort studies&#44; and 1 longitudinal study&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">320370 controls and 104770 cases&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">Caffeinated coffee reduces the risk of BCC in dose-dependent fashion&nbsp;\t\t\t\t\t\t\n
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Article information
ISSN: 15782190
Original language: English
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Idiomas
Actas Dermo-Sifiliográficas
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