TY - JOUR AU - Cook, D J; Guyatt, G H; Salena, B J TI - Endoscopic therapy for acute nonvariceal upper gastrointestinal hemorrhage: a meta-analysis JO - Gastroenterology VL - 102 PY - 1992 DO - 10.1016/0016-5085(92)91793-4 L3 - PubMed-ID: 1530782 SP - 139 EP - 148 N1 - et al. ER -