title: Putative precursor lesions: summary and some analytical considerations.
mesh_terms: D000818:Animals; D002273:Carcinogens; D002471:Cell Transformation, Neoplastic; D006801:Humans; D009369:Neoplasms / Q000503:physiopathology; D011230:Precancerous Conditions / Q000175:diagnosis / Q000503:physiopathology*; D012107:Research Design; D013997:Time Factors
chemical_list: D002273:Carcinogens