title: Established principles and unresolved problems in carcinogenesis.
mesh_terms: D000818:Animals; D002273:Carcinogens; D002471:Cell Transformation, Neoplastic; D002478:Cells, Cultured; D003043:Cocarcinogenesis; D006728:Hormones / Q000502:physiology; D006801:Humans; D009369:Neoplasms / Q000209:etiology*; D009374:Neoplasms, Experimental / Q000209:etiology; D009928:Organ Specificity; D013045:Species Specificity
chemical_list: D002273:Carcinogens; D006728:Hormones