[Emergency endoscopy for acute upper gastrointestinal bleeding].
D000208:Acute Disease; D000293:Adolescent; D000328:Adult; D000368:Aged; D004381:Duodenal Ulcer / Q000175:diagnosis; D004724:Endoscopy; D005260:Female; D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis* / Q000628:therapy; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies