1. Department of Infectious Diseases, Nanjing Lishui People’s Hospital, Zhongda Hospital Lishui Branch, Southeast University , Nanjing , China
2. Department of Gastroenterology, Liyang People’s Hospital, Liyang Branch Hospital of Jiangsu Province Hospital , Nanjing , China
3. Department of Clinical Medicine, Nanjing Medical University , Nanjing , China
4. Department of Geriatric Gastroenterology, The First Affiliated Hospital of Nanjing Medical University , Nanjing , China