1 Department of Endocrinology & Metabolism, Shanghai Jiaotong University Affiliated Sixth People's Hospital, Shanghai Key Clinical Center of Metabolic Disease, Shanghai 200233, China.
2 Department of Endocrinology & Metabolism, Shanghai Jiaotong University Affiliated Sixth People's Hospital, Shanghai Key Clinical Center of Metabolic Disease, Shanghai 200233, China. Email: f-liu@sjtu.edu.cn.