1. Hopp Children's Cancer Center Heidelberg (KiTZ), Heidelberg, Germany
2. Clinical Cooperation Unit Pediatric Oncology, German Cancer Research Center (DKFZ), Heidelberg, Germany
3. Department of Pediatric Oncology, Hematology, Immunology and Pulmonology, Heidelberg University Hospital, Heidelberg, Germany
4. German Cancer Consortium (DKTK), Heidelberg, Germany
5. Heidelberg Medical Faculty, University of Heidelberg, Heidelberg, Germany
6. National Center for Tumor Diseases (NCT), Heidelberg, Germany
7. Division of Pediatric Neurooncology, German Cancer Research Center (DKFZ), Heidelberg, Germany
8. Division of Pediatric Glioma Research, German Cancer Research Center (DKFZ), Heidelberg, Germany
9. Department of Pediatrics, St Anna Children's Hospital, Medical University of Vienna, and St Anna Children's Cancer Research Institute (CCRI), Vienna, Austria
10. Tampere Center for Child Health Research and Tays Cancer Centre, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
11. Division of Pediatric Hematology-Oncology, First Department of Pediatrics, National and Kapodistrian University of Athens, Athens, Greece
12. Department of Pediatric Hematology/Oncology and BMT, Wroclaw Medical University, Wroclaw, Poland
13. Astrid Lindgrens Childrens Hospital, Karolinska University Hospital, K6 Women's and Children's Health, K6 Paediatric Oncology and Paediatric Surgery, Stockholm, Sweden
14. Department of Oncology, University Children's Hospital, Zurich, Switzerland
15. Princess Máxima Center for Pediatric Oncology, Utrecht, the Netherlands
16. Department of Ped Oncology, Erasmus MC-Sophia Children's Hospital, Rotterdam, the Netherlands
17. Department of Pharmaceutical Sciences, Utrecht University, Utrecht, the Netherlands
18. West German Cancer Center, Pediatrics III, University Hospital Essen, Essen, Germany
19. Department Biostatistics, German Cancer Research Center (DKFZ), Heidelberg, Germany