Failure to produce tumours in cattle with 20-methylcholanthrene and 3,4-benzpyrene.
D000818:Animals; D001580:Benzopyrenes; D001996:Bronchopneumonia / Q000139:chemically induced; D002417:Cattle; D005260:Female; D008748:Methylcholanthrene; D009374:Neoplasms, Experimental / Q000139:chemically induced*; D009393:Nephritis / Q000139:chemically induced; D012513:Sarcoma, Experimental / Q000139:chemically induced
D001580:Benzopyrenes; D008748:Methylcholanthrene