Upper gastrointestinal endoscopy in a general surgical unit.
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D004724:Endoscopy; D005767:Gastrointestinal Diseases / Q000175:diagnosis* / Q000628:therapy; D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis; D005773:Gastroscopy; D006801:Humans; D008875:Middle Aged; D011446:Prospective Studies; D013503:Surgery Department, Hospital