1. Division of Haematology/Oncology, Hospital for Sick Children, Toronto, Ontario, Canada
2. Service of Hematology/Oncology, Hospital JP Garrahan, Buenos Aires, Argentina
3. Service of Interdisciplinary Clinic, Hospital JP Garrahan, Buenos Aires, Argentina
4. Service of Pathology, Hospital JP Garrahan, Buenos Aires, Argentina
5. Service of Diagnostic Imaging, Hospital JP Garrahan, Buenos Aires, Argentina
6. Program in Developmental and Stem Cell Biology, Arthur and Sonia Labatt Brain Tumor Research Centre, Hospital for Sick Children, Toronto, Ontario, Canada
7. Developmental Neurobiology, Brain Tumor Research Division, St Jude Children’s Research Hospital, Memphis, Tennessee
8. Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada