1. Department of Internal Medicine, Division of Endocrinology (R.C.K., M.A.T., F.H.d.J.), Erasmus University Medical Centre, 3000 CA Rotterdam, The Netherlands
2. Department of Pediatrics, Division of Pediatric Endocrinology (R.C.K., S.L.S.D.), Erasmus University Medical Centre, 3000 CA Rotterdam, The Netherlands
3. Department of Pediatric Urology (K.P.W.), Erasmus University Medical Centre, 3000 CA Rotterdam, The Netherlands