1. National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland;
2. Amylin Pharmaceuticals, San Diego, California;
3. The Hospital for Sick Children, Toronto, Ontario, Canada;
4. Department of Medicine, Division of Metabolism, Endocrinology, and Nutrition, Veterans Affairs Puget Sound Health Care System, University of Washington, Seattle, Washington.