1. Department of Gastroenterology, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210000, China
2. Department of Gastroenterology, The First School of Clinical Medicine of Nanjing Medical University, Nanjing 210000, China
3. Department of Gastroenterology, Nanjing Lishui People’s Hospital, Lishui, Nanjing 211200, China
4. Department of Gastroenterology, Shengze Hospital, Suzhou 210000, China