1. Department of Pediatrics, Yale University School of Medicine, New Haven, Connecticut;
2. Department of Endocrinology, University of Leipzig, Germany;
3. Department of Plastic Surgery, Yale University School of Medicine, New Haven, Connecticut;
4. Diabetes Branch, NIDDK/National Institutes of Health, Bethesda, Maryland;
5. Department of Internal Medicine and Cellular & Molecular Physiology, Yale University School of Medicine, New Haven, Connecticut;
6. Laboratory of Biological Modeling, NIDDK/National Institutes of Health, Bethesda, Maryland.