1. Department of Gastroenterology, The 2nd Affiliated Hospital, Kunming Medical University, Kunming, Yunnan, China (mainland)
2. Institute of Digestive Diseases, Chinese PLA General Hospital, Beijing, China (mainland)
3. Department of Gastroenterology, Beijing Tian Tan Hospital, Beijing, China (mainland)
4. Department of Gastroenterology, Zhongshan Hospital, Fudan University, Shanghai, China (mainland)
5. Department of Gastroenterology, Xi'an Central Hospital, Xi’an, Shanxi, China (mainland)
6. Department of Gastroenterology, First Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu, China (mainland)
7. Department of Gastroenterology, First Affiliated Hospital, Zhejiang Chinese Medical University, Hangzhou, Zhejiang, China (mainland)
8. Department of Gastroenterology, Zhongshan Hospital, Xiamen University, Xiamen, Fujian, China (mainland)
9. Department of Gastroenterology, First People’s Hospital of Foshan, Foshan, Guangdong, China (mainland)