Colonoscopy vs barium enema for evaluation of colon.
D001466:Barium Sulfate; D003106:Colon / Q000000981:diagnostic imaging; D003108:Colonic Diseases / Q000175:diagnosis / Q000000981:diagnostic imaging; D003113:Colonoscopy; D004733:Enema; D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis / Q000000981:diagnostic imaging; D006801:Humans; D011859:Radiography
D001466:Barium Sulfate