1. Department of Gastroenterology, Changhai Hospital Second Military Medical University/Naval Medical University Shanghai China
2. Digestive Endoscopy Center, Changhai Hospital Second Military Medical University/Naval Medical University Shanghai China
3. Department of Gastroenterology, Shenzhen People's Hospital Second Clinical Medical College of Jinan University Shenzhen Guangdong Province China
4. Endoscopy Center Cancer Hospital of the University of Chinese Academy of Sciences Hangzhou Zhejiang Province China
5. Division of Gastroenterology, Union Hospital, Tongji Medical College Huazhong University of Science and Technology Wuhan Hubei Province China
6. Department of General Surgery First Hospital of Lanzhou University Lanzhou Gansu Province China
7. Department of Gastroenterology and Hepatology The First Medical Center of Chinese PLA General Hospital Beijing China