2Brullet E,Carrpo R,Calvet X,et al.Factors related to the failure of endoscopic injection therapy for bleeding gastric ulcer[].Gut.1996
3Schiller K F.Haematemesis and melaena,with Special reference to factors influencing the outcome[].British Medical Journal.1990
4Segal WN,Cello JP.Upper gastrointestinal bleeding in the elderly:a retrospective comparison of patients above and below 60 years of age[].Gastrointestinal Endoscopy.1995