Exposure to polycyclic aromatic hydrocarbons among never smokers in Golestan Province, Iran, an area of high incidence of esophageal cancer – a cross-sectional study with repeated... oleh Farhad eIslami, Paolo eBoffetta, Frederik J van Schooten, Paul eStrickland, David H Phillips, Akram ePourshams, Akbar eFazel-Tabar Malekshah, Roger eGodschalk, Elham eJafari, Arash eEtemadi, Salahadin eAbubaker, Farin eKamangar, Kurt eStraif, Henrik eMøller, Joachim eSchüz, Reza eMalekzadeh