1. Diabetes Branch (P.P., J.S.-P., S.S., S.Y., D.L.), National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, Maryland 20892
2. Mouse Metabolism Core Laboratory (O.G., W.J.), National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, Maryland 20892
3. Division of Endocrinology (D.C.), University of North Carolina, Chapel Hill, North Carolina 27599