1. Department of Pediatric Hematology and Oncology, University Medical Center Hamburg-Eppendorf
2. Research Institute, Children's Cancer Center Hamburg
3. Institute of Neuropathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
4. Department of Pediatric Pathology and Neuropathology, Pediatric Hospital “Dr. Prof. J.P. Garrahan”, Buenos Aires, Argentina
5. Institute of Diagnostic and Interventional Neuroradiology of the University Hospital Würzburg, Würzburg, Germany
6. Department of Radiology, Great Ormond Street Hospital, London, United Kingdom