1. Department of Gastroenterology, Digestive Disease Hospital, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, P.R. China
2. Jiangxi Clinical Research Center for Gastroenterology, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, P.R. China
3. Department of Gastroenterology, Yudu County People’s Hospital, Ganzhou, Jiangxi, P.R.China