Refining the prognostic value of endoscopy in patients presenting with bleeding ulcers.
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D001777:Blood Coagulation; D001808:Blood Vessels / Q000473:pathology; D016145:Endoscopy, Digestive System; D006801:Humans; D010438:Peptic Ulcer Hemorrhage / Q000097:blood / Q000453:epidemiology* / Q000473:pathology; D011379:Prognosis; D012008:Recurrence; D012307:Risk Factors