1. Department of Endocrinology, the First Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, 215000, China
2. Department of Gastroenterology, Geriatric Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, 210000, China and
3. Department of Endocrinology, Affiliated Hospital of Jiangnan University, Wuxi, Jiangsu Province, 214000, China