title: Comparison of cononoscopy and contrast x-ray study in diagnosis of 500 cases of colorectal disease.
mesh_terms: D001466:Barium Sulfate; D003108:Colonic Diseases / Q000175:diagnosis* / Q000000981:diagnostic imaging; D004724:Endoscopy; D006801:Humans; D011859:Radiography; D012002:Rectal Diseases / Q000175:diagnosis* / Q000000981:diagnostic imaging
chemical_list: D001466:Barium Sulfate