Department of Gastroenterology The Second People’s Hospital of Anhui Province Hefei 230011 Anhui Province China;
Department of Gastroenterology The Second People’s Hospital of Anhui Province Hefei 230011 Anhui Province China;
Department of Gastroenterology The Second People’s Hospital of Anhui Province Hefei 230011 Anhui Province China;
Department of Gastroenterology The Second People’s Hospital of Anhui Province Hefei 230011 Anhui Province China;
Department of Gastroenterology The Second People’s Hospital of Anhui Province Hefei 230011 Anhui Province China;
Department of Gastroenterology The Second People’s Hospital of Anhui Province Hefei 230011 Anhui Province China;
Peptic ulcer; Upper gastrointestinal bleeding; Gastrin; Pepsinogen; Receiver operating characteristic curve;