1. People's Hospital of Ningxia Hui Autonomous Region (Ningxia Medical University Affiliated People's Hospital of Autonomous Region) Yinchuan China
2. Ningxia Integrated Traditional Chinese and Western Medicine Hospital Yinchuan China
3. Department of Gastroenterology Wuzhong People's Hospital Wuzhong China
4. Department of Gastroenterology Yanchi People's Hospital Yanchi China
5. Department of Gastroenterology Yinchuan First People's Hospital Yinchuan China
6. Department of Gastroenterology Zhongwei People's Hospital Zhongwei China
7. Department of Gastroenterology People's Hospital of Pingluo County Pingluo China
8. Department of Gastroenterology Guyuan Yuanzhou District People's Hospital Guyuan China
9. Department of Gastroenterology The Fifth People's Hospital of Ningxia Hui Autonomous Region Yinchuan China
10. Department of Gastroenterology Second People's Hospital of Shizuishan Shizuishan China
11. Department of Gastroenterology Shizuishan First People's Hospital Shizuishan China
12. Tongji Hospital, School of Medicine Tongji University Shanghai China
13. Institute of Digestive Disease, School of Medicine Tongji University Shanghai China