1. Department of Pediatric Hematology and Oncology University Medical Center Hamburg‐Eppendorf Hamburg Germany
2. Neuro‐Oncology Program, Division of Hematology, Oncology and BMT Nationwide Children's Hospital, Ohio State University Columbus Ohio USA
3. Pediatric Oncology, Hematology and Stem Cell Transplant Department Hospital Infantil Universitario Niño Jesús Madrid Spain
4. Department of Oncology Hospital Sant Joan de Déu Barcelona Spain
5. Neuro‐Oncology, Division of Haematology/Oncology The Hospital for Sick Children Toronto Ontario Canada
6. Global Pediatric Medicine Department St. Jude Children's Research Hospital Memphis Tennessee USA