1. German Cancer Research Center (DKFZ), Heidelberg, Germany;
2. Heidelberg University Hospital, Heidelberg, Germany;
3. NCT Trial Center, Heidelberg, Germany;
4. Department of Neuropathology, Institute of Pathology, Ruprecht-Karls-University Heidelberg, Heidelberg, Germany;
5. Charité Universitätsmedizin Berlin, Berlin, Germany;
6. University Hospital of Muenster, Muenster, Germany;
7. Hopp Children’s Cancer Center at NCT Heidelberg (KiTZ), Heidelberg, Germany;
8. Division of Pediatric Neurooncology, German Cancer Research Center (DKFZ), and Department of Pediatric Oncology, Hematology and Immunology, University Hospital Heidelberg, and German Cancer Consortium (DKTK), Heidelberg, Germany;