title: Aggressive diagnostic approach to upper gastrointestinal hemorrhage.
mesh_terms: D000792:Angiography; D001466:Barium Sulfate; D004724:Endoscopy; D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis* / Q000601:surgery; D006801:Humans; D011859:Radiography
chemical_list: D001466:Barium Sulfate