1. Division of Diabetes, Endocrinology and Metabolism, Department of Medicine, University of California, San Francisco, California 94143, USA;, ,
2. Diabetes Center, University of California, San Francisco, California 94143, USA
3. QIMR Berghofer Medical Research Institute, Herston, Queensland 4006, Australia
4. Division of Endocrinology and Metabolism, Department of Internal Medicine, Yale University School of Medicine, New Haven, Connecticut 06520, USA;
5. Department of Immunobiology, Yale University School of Medicine, New Haven, Connecticut 06520, USA;