Assay of fractions of bovine urine for carcinogenic activity after feeding bracken fern (Pteris aquilina).
D000821:Animal Feed; D000818:Animals; D002417:Cattle; D051379:Mice; D009374:Neoplasms, Experimental; D010944:Plants; D001749:Urinary Bladder Neoplasms; D014556:Urine