1. Dutch Growth Research Foundation (E.P.C.S., R.F.A.T.-d.L.v.W., D.A.M.F., Z.C.E.T., A.C.S.H.-K.), 3016 AH Rotterdam, The Netherlands
2. Departments of Pediatric Endocrinology, Erasmus University Medical Center Rotterdam/Sophia Children's Hospital (E.P.C.S., R.F.A.T.-d.L.v.W., D.A.M.F., G.C.B.B.-d.H., A.C.S.H.-K.), 3015 GJ Rotterdam, The Netherlands
3. Radboud University Nijmegen Medical Center (A.A.E.M.v.A.-v.d.V., B.J.O.), 6500 HB Nijmegen, The Netherlands
4. VU University Medical Center (J.R.), 1081 HV Amsterdam, The Netherlands
5. St. Catharina Hospital (R.J.H.O.), 5623 EJ Eindhoven, The Netherlands
6. St. Jansdal Hospital (M.v.L.), 3844 DG Harderwijk, The Netherlands
7. Diaconessen Hospital (D.A.J.P.H.), 2334 CK Leiden, The Netherlands
8. Leiden University Medical Center (W.O.), 2333 ZA Leiden, The Netherlands
9. University Medical Center Groningen/Beatrix Children's Hospital (G.B.), 9713 GZ Groningen, The Netherlands
10. Haga Hospitals/Juliana Children's Hospital (E.C.A.M.H.), 2566 MJ The Hague, The Netherlands
11. Academic Medical Center, University of Amsterdam (A.S.P.v.T.), 1105 AZ Amsterdam, The Netherlands
12. St. Antonius Hospital (J.J.G.H.-N., H.v.W.), 3430 EM Nieuwegein, The Netherlands
13. Medical Center Twente (R.C.F.M.V.), 7511 JX Enschede, The Netherlands
14. Department of Pediatrics, Jeroen Bosch Hospital (P.E.J.), 5200 ME 's-Hertogenbosch, The Netherlands
15. Isala Hospitals (E.J.S.), 8025 AB Zwolle, The Netherlands
16. Medical Center Leeuwarden (E.v.P.-N.), 8901 BR Leeuwarden, The Netherlands
17. IJsselmeer Hospitals (J.W.P.), 8233 AA Lelystad, The Netherlands
18. Gelre Hospitals (L.L.), 7300 SD Apeldoorn, The Netherlands