1. Department of Gastroenterology, The Affiliated Lianyungang Oriental Hospital of Kangda College of Nanjing Medical University, Lianyungang, Jiangsu, China
2. Department of Gastroenterology, The Affiliated Lianyungang Oriental Hospital of Xuzhou Medical University, Lianyungang, Jiangsu, China
3. Department of Surgical, School of Nursing, Yanbian University, Yanji, Jilin, China
4. Department of Gastroenterology, Sichuan Academy of Medical Sciences, Sichuan Provincial People's Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu, Sichuan, China