Bracken fern and papilloma virus in bovine alimentary cancer.
D000818:Animals; D052688:Bovine papillomavirus 1; D002417:Cattle; D002418:Cattle Diseases / Q000209:etiology*; D005260:Female; D007414:Intestinal Neoplasms / Q000209:etiology / Q000662:veterinary*; D008297:Male; D010212:Papilloma / Q000209:etiology / Q000662:veterinary*; D010939:Plant Poisoning / Q000150:complications / Q000662:veterinary*; D014412:Tumor Virus Infections / Q000150:complications / Q000662:veterinary*