1 Princess Máxima Center for Pediatric Oncology, Utrecht.
2 Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands; Erasmus MC-Sophia Children's Hospital, Department of Pediatric Oncology, Rotterdam.
3 Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands; Emma Children's Hospital, Amsterdam UMC, Vrije Universiteit, Department of Pediatric Oncology, Amsterdam.
4 Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands; Center for Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht.
5 Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands; Wilhelmina Children's Hospital/University Medical Center, Utrecht.
6 Center for Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht.
7 Department of Hematology, Amsterdam UMC, Location VUMC, Cancer Center Amsterdam.
8 Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands; Emma Children's Hospital, Amsterdam UMC, Vrije Universiteit, Department of Pediatric Oncology, Amsterdam. g.j.l.kaspers@prinsesmaximacentrum.nl.
9 Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands; Wolfson Childhood Cancer Research Centre, Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne, United Kingdom; University Medical Center Utrecht, Utrecht University, Utrecht. O.T.Heidenreich@prinsesmaximacentrum.nl.