1. Department of Endocrinology and Metabolic Diseases (K.A.H., A.A.v.d.K., J.A.R., J.W.S., E.P.C.), Leiden University Medical Center, 2300 RC Leiden, The Netherlands
2. Department of Endocrinology and Metabolism (M.R.S., E.F., M.J.S.), Academic Medical Center, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
3. Center for Human Drug Research (J.B., M.B.v.D.), 2333 CL Leiden, The Netherlands
4. Department of Internal Medicine (T.J.V.), Erasmus Medical Center, 3000 CA Rotterdam, The Netherlands