1. Department of Gastroenterology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang 310003, P.R. China
2. Traditional Medicine Center, Jinhua Hospital, Zhejiang University, Jinhua, Zhejiang 321000, P.R. China
3. Physical Examination Center, Jinhua Hospital, Zhejiang University, Jinhua, Zhejiang 321000, P.R. China