title: Does early endoscopy benefit the patient with active upper gastrointestinal bleeding?
mesh_terms: D001466:Barium Sulfate; D004724:Endoscopy / Q000009:adverse effects; D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000401:mortality; D005773:Gastroscopy / Q000009:adverse effects; D006801:Humans; D011446:Prospective Studies; D011859:Radiography; D013997:Time Factors
chemical_list: D001466:Barium Sulfate