title: Increased frequency of sister chromatid exchanges in cigarette smokers.
mesh_terms: D000328:Adult; D000368:Aged; D002478:Cells, Cultured; D002842:Chromatids; D005821:Genetic Techniques; D006801:Humans; D008214:Lymphocytes / Q000648:ultrastructure; D008875:Middle Aged; D009153:Mutagens; D011565:Psoriasis / Q000235:genetics; D012907:Smoking / Q000150:complications*
chemical_list: D009153:Mutagens