title: Duodenoscopy in the diagnosis of upper gastrointestinal bleeding.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D004381:Duodenal Ulcer / Q000150:complications; D004386:Duodenum; D004724:Endoscopy; D004935:Esophageal Diseases / Q000150:complications; D005260:Female; D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis* / Q000209:etiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D009326:Naval Medicine; D014481:United States