1. Advanced Institute for Medical Sciences, Dalian Medical University, Dalian, Liaoning, China
2. Department of Endocrinology, The Second Affiliated Hospital of China Medical University, Shenyang, Liaoning, China
3. The Cadre Department, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning, China
4. Department of Gastroenterology, Tieling Central Hospital, Tieling, Liaoning, China
5. Department of Endocrinology, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning, China