title: Letter: Aryl hydrocarbons, smoking and lung cancer.
mesh_terms: D000397:Air Pollution / Q000032:analysis; D004781:Environmental Exposure; D006801:Humans; D008175:Lung Neoplasms / Q000139:chemically induced / Q000209:etiology* / Q000235:genetics; D011083:Polycyclic Compounds / Q000032:analysis*; D012907:Smoking / Q000150:complications*
chemical_list: D011083:Polycyclic Compounds