[1] Univ Amsterdam, Amsterdam UMC, Emma Childrens Hosp, Dept Pediat Oncol, Amsterdam, Netherlands
[2] Princess Maxima Ctr Pediat Oncol, POB 113, NL-3584 CS Utrecht, Netherlands
[3] Netherlands Canc Inst, Dept Epidemiol & Biostat, Amsterdam, Netherlands
[4] Univ Groningen, Univ Med Ctr Groningen, Beatrix Childrens Hosp, Dept Pediat Oncol Hematol, Groningen, Netherlands
[5] Erasmus MC, Sophia Childrens Hosp, Endocrinol Sect, Dept Pediat Oncol Hematol & Med, Rotterdam, Netherlands
[6] Radboud Univ Nijmegen, Med Ctr, Dept Hematol, Nijmegen, Netherlands
[7] Univ Med Ctr Utrecht, Wilhelmina Childrens Hosp, Dept Pediat Oncol & Hematol, Utrecht, Netherlands
[8] Erasmus MC, Sophia Childrens Hosp, Dept Pediat Oncol Hematol, Rotterdam, Netherlands
[9] Vrije Univ Amsterdam, Amsterdam UMC, Dept Pediat Oncol Hematol, Amsterdam, Netherlands
[10] Dutch Childhood Oncol Grp, Utrecht, Netherlands
[11] Netherlands Canc Inst, Dept Radiat Oncol, Amsterdam, Netherlands
[12] Leiden Univ, Med Ctr, Dept Radiat Oncol, Leiden, Netherlands
[13] Vrije Univ Amsterdam, Amsterdam UMC, Dept Radiat Oncol, Amsterdam, Netherlands
[14] Radboud Univ Nijmegen, Med Ctr, Dept Radiat Oncol, Nijmegen, Netherlands
[15] Univ Med Ctr Utrecht, Dept Radiat Oncol, Utrecht, Netherlands
[16] Univ Groningen, Univ Med Ctr Groningen, Dept Radiat Oncol, Groningen, Netherlands
[17] Univ Amsterdam, Amsterdam UMC, Dept Radiat Oncol, Amsterdam, Netherlands
[18] Erasmus MC, Dept Radiat Oncol, Rotterdam, Netherlands
[19] Vrije Univ Amsterdam, Amsterdam UMC, Amsterdam, Netherlands
[20] PALGA Fdn, Houten, Netherlands
[21] Univ Amsterdam, Emma Childrens Amsterdam UMC, Amsterdam, Netherlands
[22] Univ Groningen, Univ Med Ctr Groningen, Groningen, Netherlands
[23] Dutch Childhood Canc Parent Org VOKK, Nieuwegein, Netherlands
[24] Radboud Univ Nijmegen Med Ctr, Nijmegen, Netherlands
[25] Univ Med Ctr Utrecht, Utrecht, Netherlands
[26] Univ Amsterdam, Amsterdam UMC, Amsterdam, Netherlands