1. Department of Gastroenterology, First Affiliation Hospital; Guangzhou University of Chinese Medicine; Guangzhou China
2. First School of Clinic Medicine; Guangzhou University of Chinese Medicine; Guangzhou China
3. Department of Preventive Medicine and Health Statistics, College of Basic Medical Sciences; Guangzhou University of Chinese Medicine; Guangzhou China
4. Department of Gastroenterology; Jiangmen Wuyi Traditional Chinese Medicine Hospital; Jiangmen China