title: Sources of acute upper gastrointestinal hemorrhage in patients with large esophageal varices: endoscopic findings.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002648:Child; D004932:Esophageal and Gastric Varices / Q000150:complications*; D005260:Female; D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis* / Q000209:etiology; D005773:Gastroscopy; D006801:Humans; D008297:Male; D008875:Middle Aged