1 Department of Neurosurgery, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246, Hamburg, Germany.
2 Department of Neuropathology, University Hospital Magdeburg, Magdeburg, Germany.
3 Department of Neuropathology, University Hospital Heidelberg, Heidelberg, Germany.
4 Institute of Neuropathology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246, Hamburg, Germany.
5 Department of Pediatric Hematology and Oncology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246, Hamburg, Germany.
6 Institute of Neuropathology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246, Hamburg, Germany. u.schueller@uke.de.
7 Department of Pediatric Hematology and Oncology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246, Hamburg, Germany. u.schueller@uke.de.
8 Research Institute Children's Cancer Center Hamburg, Martinistraße 52, 20251, Hamburg, Germany. u.schueller@uke.de.
9 Department of Neurosurgery, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246, Hamburg, Germany. s.eicker@uke.de.