1. Endocrine Research Unit (M.Bie., B.J.M.S., D.M., M.Bid.), Medizinische Klinik-Innenstadt, Ludwig-Maximilians University, 80336 Munich, Germany;
2. Laboratory of Mouse Genetics (M.S., A.H.), Research Unit Genetics and Biometry, Leibniz Institute for Farm Animal Biology, 18196 Dummerstorf, Germany;
3. First Department of Medicine (P.S., S.E., B.C.), Molecular Hepatology Lab, Martin-Luther University Halle-Wittenberg, 06120 Halle, Germany;
4. Medical Research Laboratories (M.Bj., J.F.), Clinical Institute, Aarhus University Hospital, DK 8000 Aarhus, Denmark;
5. University-Children's Hospital (G.B.), Pediatric Endocrinology, 72076 Tübingen, Germany;
6. Division of Endocrinology (C.S., Z.W.), Department of Internal Medicine, Campus Charité Mitte, Universitaetsmedizin Berlin, 10117 Berlin, Germany