1. Division of Metabolism, Endocrinology, and Diabetes (M.F., R.L., M.B., T.H., J.J., H.M.), Departments of Medicine and Molecular and Integrative Physiology, University of Michigan Medical School, Ann Arbor, Michigan 48109
2. Section of Integrative Physiology (M.B.), Department of Molecular Medicine and Surgery, Karolinska Institute, 171 77 Stockholm, Sweden