1. Department of Gastroenterology, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, Hangzhou, China
2. Inflammatory Bowel Disease Center of Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, Hangzhou, China
3. Department of Gastroenterology, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, 3 East Qingchun Road, Shangcheng District, Hangzhou 310016, China