1. Department of Gastroenterology, Changhai Hospital, Second Military Medical University, Shanghai, China
2. Department of Gastroenterology, Heilongjiang Province Hospital, Harbin, China
3. Department of Gastroenterology, First People’s Hospital of Hangzhou, Hangzhou, Zhejiang, China
4. Department of Gastroenterology, First Affiliated Hospital, Nan Chang University, Jiangxi, China
5. Department of Gastroenterology, Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi’an, China
6. Department of Gastroenterology, First People’s Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
7. Department of Gastroenterology, Urumchi General Hospital, Lanzhou Command, PLA, China
8. Gastrointestinal Endoscopy Center, Jiangsu Provincial Hospital of Traditional Chinese Medicine, Nanjing, Jiangsu, China
9. Department of Gastroenterology, Southwest Hospital, Third Military Medical University, Chongqing, China
10. Department of Gastroenterology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
11. Department of Gastroenterology, Beijing Friendship Hospital, Capital Medical University, Beijing, China