1. Dutch Growth Research Foundation (L.A.M., G.R.J.Z., M.A.J.d.R., A.C.S.H.-K.), 3001 KB Rotterdam, The Netherlands
2. Department of Pediatrics (L.A.M., T.C.J.S., W.H.S.-B., J.M.W.), Leiden University Medical Center, 2300 RC Leiden, The Netherlands
3. Erasmus Medical Center (S.M.P.F.d.M.K.-S., A.C.S.H.-K.), Sophia Children’s Hospital, 3000 CA Rotterdam, The Netherlands
4. Department of Biostatistics (M.A.J.d.R.), Sophia Children’s Hospital, 3000 CA Rotterdam, The Netherlands
5. Department of Pediatrics (R.J.O.), University Medical Center Groningen, 9700 RB Groningen, The Netherlands
6. University Medical Center Utrecht (M.J.), Wilhelmina Children’s Hospital, 3508 GA Utrecht, The Netherlands
7. Department of Pediatrics (H.A.D.-v.d.W.), Free University Medical Center, 1007 MB Amsterdam, The Netherlands
8. Department of Pediatrics (J.J.W.), Catharina Hospital Eindhoven, 5602 ZA Eindhoven, The Netherlands
9. Department of Pediatrics (C.W.), Canisius Wilhelmina Hospital, 6500 GS Nijmegen, The Netherlands
10. Juliana Children’s Hospital (H.M.R.), Haga Hospital, 2566 MJ The Hague, The Netherlands
11. Academic Medical Center (A.S.P.v.T.), Emma Children’s Hospital, 1100 DE Amsterdam, The Netherlands
12. Division of Molecular Neuroendocrinology (E.F.G.), National Institute for Medical Research, London NW7 1AA, United Kingdom
13. Department of Statistics (S.v.B.), TNO Quality of Life, 2333 AL Leiden, The Netherlands
14. Department of Methodology and Statistics (S.v.B.), University of Utrecht, Faculty of Social Sciences, 3508 TC Utrecht, The Netherlands
15. Department of Phoniatrics (P.H.D.), Wilhelmina Children’s Hospital, 3508 GA Utrecht, The Netherlands
16. Department of Pediatrics (B.J.O.), University Medical Center Radboud, 6500 HB Nijmegen, The Netherlands