1. Beijing Youan Hospital, Capital Medical University, Beijing, China
2. Beijing Tongren Hospital, Capital Medical University, Beijing, China
3. The Fifth Medical Center of PLA General Hospital, Beijing, China
4. Beijing Ditan Hospital, Capital Medical University, Beijing, China
5. Tianjin Third Central Hospital, Tianjin, China
6. The First Affiliated Hospital of Xinxiang Medical University, Henan, China
7. Division on Gastroenterology and Hepatology, NYU Langone Health, NYU Grossman School of Medicine, NY.