1. Endocrine Research Unit, Division of Endocrinology, Diabetes, Metabolism, and Nutrition, Mayo Clinic, Rochester, MN, USA
2. Department of Anesthesiology, Mayo Clinic, Rochester, MN, USA
3. Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA
4. IDDM Consulting, Menlo Park, CA, USA
5. Department of Health Sciences Research, Mayo College, Rochester, MN, USA