1. Department of Gastroenterology The First Affiliated Hospital of Sun Yat‐Sen University Guangzhou China
2. Department of Gastroenterology The Second Xiangya Hospital of Central South University Changsha Hunan Province China
3. Department of Gastroenterology The Second Affiliated Hospital of University of South China Hengyang Hunan Province China
4. Department of Gastroenterology The First Affiliated Hospital of University of South China Hengyang Hunan Province China
5. Department of Gastroenterology Chenzhou First People's Hospital Chenzhou Hunan Province China
6. Department of Gastroenterology Binzhou Medical University Hospital Binzhou Shandong Province China
7. Department of Gastroenterology JiangXi PingXiang People's Hospital Pingxiang Jiangxi Province China
8. Department of Gastroenterology Taihe Hospital Shiyan Hubei Province China
9. Department of Gastroenterology Zigong Fourth People's Hospital Zigong Sichuan Province China
10. Department of Gastroenterology Changzhou First People's Hospital Changzhou Changzhou Jiangsu Province China
11. Department of Gastroenterology Wuxi People's Hospital Wuxi Jiangsu Province China
12. Department of Gastroenterology The First Hospital of Lanzhou University Lanzhou Gansu Province China
13. Department of Gastroenterology Hainan General Hospital Haikou Hainan Province China
14. Department of Gastroenterology The Second Affiliated Hospital of Nanchang University Nanchang Jiangxi Province China
15. Department of Gastroenterology Affiliated Hospital of Jiangsu University Jiangsu Province China
16. Department of Gastroenterology Jiangmen Central Hospital Jiangmen China
17. Department of Gastroenterology Huizhou Central People's Hospital Huizhou China