title: A new look at an "old friend"--upper gastrointestinal hemorrhage.
mesh_terms: D003937:Diagnosis, Differential; D004724:Endoscopy; D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis / Q000209:etiology*; D006801:Humans; D010808:Physical Examination; D013577:Syndrome / Q000175:diagnosis