title: Colonoscopy in the investigation of ulcerative colitis.
mesh_terms: D001466:Barium Sulfate; D003093:Colitis, Ulcerative / Q000000981:diagnostic imaging / Q000473:pathology; D003106:Colon; D004724:Endoscopy; D006801:Humans; D011859:Radiography
chemical_list: D001466:Barium Sulfate