1. Inflammatory Bowel Disease Center, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University , Hangzhou , China
2. Department of Gastroenterology, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University , Hangzhou , China
3. Department of General Surgery, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University , Hangzhou , China
4. Department of Gastroenterology, The Second Xiangya Hospital, Central South University , Changsha , China
5. Department of Gastroenterology, Shengjing Hospital, China Medical University, Shenyang , China
6. Department of Gastroenterology, Nanjing Drum Tower Hospital, School of Medicine, Nanjing University , Nanjing , China
7. Department of Gastroenterology, Xijing Hospital, School of Medicine, Fourth Military Medical University , Xi’an , China
8. Department of General Surgery, Jinling Hospital, Nanjing University , Nanjing , China