1. Division of Endocrinology, Metabolism, and Nutrition, Endocrine Research Unit, Mayo Clinic and Mayo Foundation (Z.T.R., B.-K.C., L.K.B., C.A.C.), Rochester, Minnesota 55905
2. Department of Molecular Biology, University of Aarhus (C.O., M.T.O.), DK-8000 Aarhus C, Denmark