1. Institute for Diabetes and Obesity (K.S., C.N., M.H.T.), Helmholtz Centre Munich, 85764 Neuherberg, Germany
2. Endocrine Research Unit (M.Bie., M.Bid.), Medizinische Klinik und Poliklinik IV, Klinikum der Ludwig-Maximilians-Universität München, 80336 Munich, Germany
3. Metabolic Diseases Institute (B.E.G., D.P.B., A.P.C., S.C.W., R.J.S.), University of Cincinnati, Cincinnati, Ohio 45237
4. Department of Biomedical Sciences (R.G.E.), University of Veterinary Medicine Vienna, 1210 Vienna, Austria
5. Department of Orthopaedic Surgery (T.L.C.), Johns Hopkins University School of Medicine, Baltimore, Maryland 21287