1. Department of Gastroenterology, Hainan General Hospital (Hainan Affiliated Hospital of Hainan Medical University), Haikou 570100, China
2. Department of Gastroenterology and Hepatology, Zhongshan Hospital of Fudan University, Shanghai 200030, China
3. Department of Gastroenterology, Central South University Xiangya School of Medicine Affiliated Haikou Hospital, Haikou 570100, China
4. Department of Gastroenterology, Sanya People’s Hospital, Sanya 572000, China
5. Department of General Surgery, People’s Hospital of Xinjiang Uygur Autonomous Region, Urumqi 830001, China
6. Hainan Medical University, Haikou 570100, China
7. Medical Examination, School of Tropical Medicine and Laboratory Medicine, Hainan Medical University, Haikou 570100, China