Early endoscopic diagnosis in upper gastrointestinal hemorrhage. An analysis of 323 cases.
D001464:Barium; D004724:Endoscopy; D004945:Esophagoscopy; D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis*; D005773:Gastroscopy; D006801:Humans; D011859:Radiography
D001464:Barium