1. Department of Endocrinology and Metabolism (Z.Z., J.L., A.G.V.-V., E.Fo., A.K., A.B., E.Fl., P.H.B.)
2. VU University Medical Center, Research Institute MOVE, 1081 BT Amsterdam, The Netherlands; and Child Health Institute of New Jersey (J.L.), Robert Wood Johnson Medical School, Rutgers University, New Jersey 08901
3. Academic Medical Center, University of Amsterdam, 1105 AZ The Netherlands; Hypothalamic Integration Mechanisms (Y.S., A.K.)
4. Netherlands Institute for Neuroscience, 1105 BA Amsterdam, The Netherlands; Department of Internal Medicine (B.C.J.v.d.E., M.K.)
5. Erasmus Medical Center, 3075 EA Rotterdam, The Netherlands; Department of Clinical Chemistry (N.B.)