1. Division of Pediatric Hematology and Oncology, Department of Pediatrics and Adolescent Medicine, Medical University of Graz, Graz, Austria
2. Department of Pediatric Hematology and Oncology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
3. Hopp Children's Cancer Center (KiTZ), Nationales Centrum für Tumorerkrankungen (NCT) Heidelberg, Heidelberg, Germany
4. Division of Pediatric Neurooncology, German Cancer Research Center (DKFZ) and German Cancer Consortium (DKTK), Heidelberg, Germany
5. Department of Pediatric Oncology, Hematology, and Immunology, Heidelberg University Hospital, Heidelberg, Germany
6. Institute of Diagnostic and Interventional Neuroradiology, University Hospital Würzburg, Würzburg, Germany
7. Institute of Neuropathology, Brain Tumor Reference Center of the German Society for Neuropathology and Neuroanatomy (DGNN), University of Bonn, Bonn, Germany
8. Institute of Neuropathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
9. Research Institute Children's Cancer Center, Hamburg, Germany
10. Department of Radiation Oncology, University of Leipzig, Leipzig, Germany
11. Pediatric Hematology and Oncology, Pediatrics III, University Children's Hospital of Essen, Essen, Germany
12. Dr. von Hauner Children's Hospital, Ludwig Maximilians University, Munich, Germany
13. Division of Pediatric Hematology and Oncology, University Medical Center Göttingen, Göttingen, Germany
14. Department of Pediatric Hematology/Oncology, University Otto von Guericke Magdeburg, Magdeburg, Germany
15. Department of Pediatric Hematology/Oncology, Medical School Hannover, Hanover, Germany
16. University Children's Hospital, Rostock, Germany
17. Department of Pediatric Oncology and Hematology, Charité - Universitätsmedizin Berlin, (corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health), Berlin, Germany
18. Department of Pediatrics I, Medical University of Innsbruck, Innsbruck, Austria
19. Zentrum für Kinder- und Jugendmedizin, Helios Klinikum Krefeld, Krefeld, Germany
20. Pediatric Hematology and Oncology Unit, Department of Pediatrics, Helios Klinikum Erfurt, Erfurt, Germany