title: Upper gastrointestinal bleeding.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D005260:Female; D006471:Gastrointestinal Hemorrhage / Q000209:etiology* / Q000601:surgery; D006801:Humans; D008297:Male; D008875:Middle Aged; D010437:Peptic Ulcer / Q000150:complications* / Q000601:surgery