1. Department of Gastroenterology The Second Affiliated Hospital of Xuzhou Medical University Xuzhou Jiangsu China
2. Department of Gastroenterology The Yancheng Clinical College of Xuzhou Medical University Yancheng Jiangsu China
3. Department of Gastroenterology The First People's Hospital of Yancheng Yancheng Jiangsu China
4. Department of Gastroenterology The Sixth People's Hospital of Nantong Nantong Jiangsu China