1. School of Medicine, Shanghai Jiao Tong University, Shanghai 200233, China
2. Department of Endocrinology and Metabolism, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai Diabetes Institute, Shanghai Clinical Center of Diabetes, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai 200233, China
3. Department of medicine, Soochow University, Soochow 215006, China