Hangzhou, China
Author Affiliations: Department of Gastroenterology, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China (Li YM)
Corresponding Author: You-Ming Li, MD, Department of Gastroenterology, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China (Tel: 86-571-87236603; Fax: 86-571-87236611; Email:
zlym@zju.edu.cn)