Accuracy of early endoscopy in acute upper gastrointestinal bleeding.
D000208:Acute Disease; D000293:Adolescent; D000328:Adult; D000368:Aged; D003951:Diagnostic Errors; D004724:Endoscopy; D005260:Female; D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis*; D006801:Humans; D008297:Male; D008875:Middle Aged