1. Departments of Pediatric Oncology/Hematology (R.D.v.B., M.M.v.d.H.-E., F.G.H.-C., R.P.), Erasmus Medical Center-Sophia Children’s Hospital, 3000 CB Rotterdam, The Netherlands
2. Pediatric Endocrinology (R.D.v.B., S.M.P.F.d.M.K.-S.), Erasmus Medical Center-Sophia Children’s Hospital, 3000 CB Rotterdam, The Netherlands
3. Departments of Pediatric Oncology (C.v.d.B.), Academic Medical Center-Emma Children’s Hospital, 1081 HV Amsterdam, The Netherlands
4. Medical Oncology (H.J.H.v.d.P.), Academic Medical Center-Emma Children’s Hospital, 1081 HV Amsterdam, The Netherlands
5. Departments of Nuclear Medicine (E.P.K.), Erasmus Medical Center, 3000 DR Rotterdam, The Netherlands
6. Clinical Chemistry (Y.B.d.R.), Erasmus Medical Center, 3000 DR Rotterdam, The Netherlands