Significance of signs of recent haemorrhage at endoscopy.
D004381:Duodenal Ulcer / Q000150:complications; D004630:Emergencies; D004724:Endoscopy; D005773:Gastroscopy; D006801:Humans; D010438:Peptic Ulcer Hemorrhage / Q000175:diagnosis* / Q000209:etiology / Q000601:surgery; D012008:Recurrence; D012189:Retrospective Studies; D012306:Risk; D013276:Stomach Ulcer / Q000150:complications; D013997:Time Factors