1. Department of Internal Medicine, Yale University School of Medicine, New Haven, Connecticut;
2. Veterans Affairs Medical Center, West Haven, Connecticut;
3. Howard Hughes Medical Institute, Yale University School of Medicine, New Haven, Connecticut;
4. Department of Cellular & Molecular Physiology, Yale University School of Medicine, New Haven, Connecticut;
5. Department of Medicine, The University of Chicago, Chicago, Illinois;
6. Department of Physiology and Biophysics, Robert Wood Johnson Medical, School, Piscataway, New Jersey; and
7. Center for Diabetes Research and Department of Medicine, The Methodist Hospital Research Institute, Houston, Texas
8. Department of Pediatrics, The University of Chicago, Chicago, Illinois;
9. Department of Cell Biology, Yale University School of Medicine, New Haven, Connecticut;