1. Department of Gastroenterology Nanjing Drum Tower Hospital Clinical College of Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine Nanjing Jiangsu China
2. Department of Gastroenterology Huai'an Second People's Hospital, The Affiliated Huai'an Hospital of Xuzhou Medical University Huai'an Jiangsu China
3. Department of Gastroenterology Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School Nanjing Jiangsu China
4. Department of Gastroenterology Affilated Taikang Xianlin Drum Tower Hospital, Medical school of Nanjing University Nanjing Jiangsu China