1. Shanghai Diabetes Institute, Department of Endocrinology and Metabolism, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai Clinical Centre for Diabetes, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University of Medicine, Shanghai 200233, China.
2. Department of Endocrinology, Luoyang Central Hospital Affiliated to Zhengzhou University, Luoyang, Henan 471000, China.
3. Department of Endocrinology, Drum Tower Hospital affiliated to Nanjing University Medical School, Branch of National Clinical Research Centre for Metabolic Diseases, Nanjing, Jiangsu 210008, China.
4. Department of Endocrinology, The First Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan 453100, China.
5. Department of Endocrinology and Metabolism, Peking University People's Hospital, Peking University Diabetes Center, Beijing 100044, China.
6. Department of Endocrinology, First Affiliated Hospital of Gannan Medical University, Ganzhou, Jiangxi 341000, China.