title: Coloscopy: a critical comment.
mesh_terms: D000758:Anesthesia; D001466:Barium Sulfate; D001706:Biopsy; D003093:Colitis, Ulcerative / Q000175:diagnosis; D003106:Colon / Q000000981:diagnostic imaging*; D012809:Colon, Sigmoid / Q000000981:diagnostic imaging; D003108:Colonic Diseases / Q000175:diagnosis; D003110:Colonic Neoplasms / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000601:surgery; D003424:Crohn Disease / Q000175:diagnosis; D003951:Diagnostic Errors; D003975:Diazepam; D019723:Endoscopes; D004724:Endoscopy / Q000009:adverse effects; D006801:Humans; D007416:Intestinal Perforation; D007417:Intestinal Polyps / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000601:surgery; D008614:Meperidine; D008722:Methods; D009609:Nitrous Oxide; D011859:Radiography; D012812:Sigmoidoscopy
chemical_list: D001466:Barium Sulfate; D008614:Meperidine; D009609:Nitrous Oxide; D003975:Diazepam