1. Department of Gastroenterology, Haian Hospital of Traditional Chinese Medicine affiliated to Nanjing University of Chinese Medicine, Haian, Jiangsu 226600, P.R. China
2. Department of Liver Disease, The Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210029, P.R. China
3. First College of Clinical Medicine, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210029, P.R. China