Gastrointestinal bleeding.
D000208:Acute Disease; D000328:Adult; D000368:Aged; D000792:Angiography; D004724:Endoscopy; D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis* / Q000209:etiology / Q000628:therapy; D006801:Humans; D008875:Middle Aged; D010808:Physical Examination; D012151:Resuscitation