title: Sister chromatid exchanges in smokers of high-tar cigarettes, low-tar cigarettes, cheroots and pipe tobacco.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000428:Alcohol Drinking; D003434:Crossing Over, Genetic / Q000187:drug effects; D006801:Humans; D008875:Middle Aged; D012854:Sister Chromatid Exchange / Q000187:drug effects; D012907:Smoking; D013638:Tars / Q000633:toxicity*
chemical_list: D013638:Tars