title: Endoscopic examination of the duodenal bulb: a comparison with X-ray.
mesh_terms: D004378:Duodenal Diseases / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology; D004381:Duodenal Ulcer / Q000175:diagnosis; D004724:Endoscopy; D006801:Humans; D008722:Methods; D011859:Radiography