“…The regular and active participation in fire combat has been linked with excess morbidity and mortality among firefighters, being the cardio-respiratory diseases the leading causes of death (Gianniou et al, 2016;Gaughan et al, 2014a, b;Soteriades et al, 2011). Some authors have also associated firefighters' occupational exposure with a possibility of increased risk to develop site-specific cancers, such as leukemia, esophageal, lung, kidney and bladder, skin melanoma, testicular, and urothelial cancer (LeMasters et al, 2006;Daniels et al, 2014;Glass et al, 2016;Golka and Weistenhöfer, 2008;Pukkala et al, 2014;Stec et al, 2018;Youakim, 2006). Furthermore, smoking workers are at a higher risk of suffering from the potential cumulative health risks associated with a regular exposure to fire emissions and tobacco consumption (Fernando et al, 2016;Oliveira et al, 2017c).…”