1. Diabetes, Endocrinology, and Obesity Branch (K.Y.C., R.J.B., J.D.L., S.S., P.L., F.S.C.), National Institute of Diabetes and Digestive
2. Kidney Diseases, Department of Nutrition (A.C.), Clinical Center, Maryland 20892-1613
3. PET Department (W.D., P.H., C.M.M.), Clinical Center, Maryland 20892-1613
4. Department of Laboratory Medicine (A.R.), Clinical Center, National Institutes of Health, Bethesda, Maryland 20892-1613