1. Department of Endocrinology, Diabetes, and Nutrition (A.M.A., M.O.W., J.S., M.M., A.F.H.P.), Charité-University Medicine Berlin, 12200 Berlin, Germany
2. Department of Clinical Nutrition (A.M.A., M.O.W., J.S., M.M., A.F.H.P.), German Institute of Human Nutrition Potsdam-Rehbruecke, 14558 Nuthetal, Germany
3. Medical Research Laboratories and Medical Department M (J.F.), Aarhus University Hospital, DK-8000 Aarhus C, Denmark
4. Division of Neuroendocrinology (C.S.), Department of Neurosurgery, Friedrich-Alexander-University Erlangen-Nuremberg, 91054 Erlangen, Germany