Yi Hu1,2,3, Nong-Hua Lu1,2. 1. Department Of Gastroenterology, Digestive Disease Hospital, The First Affiliated Hospital of Nanchang University, Nanchang, China. 2. JiangXi Clinical Research Center for Gastroenterology, Nanchang, China. 3. Department Of Gastroenterology, Shenzhen Hospital of The First Affiliated Hospital of Nanchang University, Shenzhen, China.