1. Department of Endocrinology and Metabolism, Shanghai Diabetes Institute, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai 200233, China
2. The University of Hong Kong, Pokfulam, Hong Kong
3. University of Pittsburg, Pittsburgh, PA 15261, USA
4. Chinese Academy of Science, Shanghai 200031, China
5. Pennington Biomedical Research Center, Louisiana State University, Baton Rouge, LA 70808, USA