1. Endocrine Research Unit, Division of Endocrinology, Diabetes, Metabolism, and Nutrition (R.B., S.D., A.B., R.A.R.), Rochester, Minnesota 55905
2. Center for Neurosciences and Cell Biology (C.B., J.J.), University of Coimbra, Coimbra, 3004-517 Portugal
3. Portuguese Diabetes Association (J.J.), Lisbon, 3004-517 Portugal
4. Department of Health Sciences Research (R.C.), Mayo Clinic, Rochester, Minnesota 55905