1. Dutch Growth Research Foundation (R.F.A.d.L.v.W., E.P.C.S., D.A.M.F., A.C.S.H.-K.), 3016 AH Rotterdam, The Netherlands
2. Departments of Pediatric Endocrinology, Erasmus University Medical Center Rotterdam/Sophia Children’s Hospital (R.F.A.d.L.v.W., E.P.C.S., D.A.M.F., S.L.S.D., A.C.S.H.-K.), 3015 GJ Rotterdam, The Netherlands
3. Radboud University Nijmegen Medical Center (B.J.O.), 6500 HB Nijmegen, The Netherlands
4. Department of Pediatrics, Hieronymus Bosch Medical Center (E.G.A.H.v.M., P.E.J.), 5211 NL ‘s-Hertogenbosch, The Netherlands
5. VU University Medical Center (J.R.), 1081 HV Amsterdam, The Netherlands
6. St. Catharina Hospital (R.J.H.O.), 5623 EJ Eindhoven, The Netherlands
7. Erasmus University Medical Center Rotterdam/Sophia Children’s Hospital (G.C.B.B.-d.H.), 3015 GJ Rotterdam, The Netherlands
8. St. Jansdal Hospital (M.v.L.), 3844 DG Harderwijk, The Netherlands
9. Diaconessen Hospital (D.A.J.P.H.), 2334 CK Leiden, The Netherlands
10. University Medical Center Groningen/Beatrix Children’s Hospital (G.B.), 9713 GZ Groningen, The Netherlands
11. Haga Hospitals/Juliana Children’s Hospital (E.C.A.M.H.), 2566 MJ The Hague, The Netherlands
12. St. Antonius Hospital (J.J.G.H.-N.), 3527 CE Utrecht, The Netherlands
13. Medical Center Twente (R.C.F.M.V.), 7511 JX Enschede, The Netherlands
14. Amsterdam University Medical Center (A.S.P.v.T.), 1105 AZ Amsterdam
15. Leiden University Medical Center (B.B., J.M.W.), 2333 ZA Leiden, The Netherlands
16. Reinier de Graaf Hospital (B.B.), 2625 AD Delft, The Netherlands
17. Isala Hospitals (E.J.S.), 8025 AB Zwolle, The Netherlands
18. IJsselmeer Hospitals (J.W.P.), 8233 AA Lelystad, The Netherlands