The value of early endoscopic diagnosis of bleeding from the upper gastrointestinal tract: experience at Ife.
D000293:Adolescent; D000328:Adult; D000368:Aged; D005260:Female; D005767:Gastrointestinal Diseases / Q000150:complications / Q000175:diagnosis; D006471:Gastrointestinal Hemorrhage / Q000209:etiology*; D005773:Gastroscopy; D006801:Humans; D008297:Male; D008875:Middle Aged; D010438:Peptic Ulcer Hemorrhage / Q000209:etiology