1. Department of General Surgery, Jiangdu People's Hospital Affiliated to Yangzhou University, Yangzhou, China
2. Department of Endocrinology, SuzhouNinth People's Hospital, Suzhou, China
3. Department of gastroenterology, Traditional Chinese Medicine Hospital of Tongzhou District, Nantong, China
4. Department of Gastroenterology, Jiangdu People's Hospital Affiliated to Yangzhou University, Yangzhou, China