title: Variation in the incidence of "spontaneous" tumours.
mesh_terms: D000821:Animal Feed; D000818:Animals; D002274:Carcinogens, Environmental; D004032:Diet / Q000009:adverse effects; D009183:Mycotoxins; D009374:Neoplasms, Experimental / Q000139:chemically induced*; D051381:Rats; D011919:Rats, Inbred Strains
chemical_list: D002274:Carcinogens, Environmental; D009183:Mycotoxins