1 Department of Pathology, University Health Network, Toronto, Ontario, Canada.
2 CRUK Cambridge Institute, Li Ka Shing Centre, Cambridge, UK.
3 The Institute of Cancer Research, London, UK.
4 Department of Oncology, St Jude Children's Research Hospital, Memphis, TN, USA.
5 Center for Cancer Research, National Cancer Institute, Bethesda, MD, USA.
6 Telethon Kids Institute, Subiaco, Western Australia, Australia.
7 Department of Neurology, Washington University School of Medicine, St. Louis, MO, USA.
8 Great Ormond Street Hospital for Children, Great Ormond Street, London, UK.
9 Human Biology Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA.
10 Pediatric Glioma Research Group, Hopp Children's Cancer Center at the NCT Heidelberg, Heidelberg, Germany.
11 Ludwig Institute for Cancer Research, University of Lausanne, Lausanne, Switzerland.
12 Cancer Research UK Clinical Trials Unit, Institute of Cancer and Genomic Sciences, University of Birmingham, Edgbaston, Birmingham, UK.
13 Dana-Farber Boston Children's Cancer and Blood Disorder's Center and Harvard Medical School, Boston, MA, USA.
14 Human Oncology and Pathogenesis Program and Department of Neurology, Memorial Sloan Kettering Cancer Center, New York, NY, USA.
15 Oncology, AstraZeneca IMED Biotech Unit, Boston, MA, USA.
16 Division of Pediatric Oncology, Hopp Children's Cancer Center at the NCT Heidelberg, Heidelberg, Germany.
17 Cancer Research UK Edinburgh Centre and Medical Research Council Centre for Regenerative Medicine, University of Edinburgh, Edinburgh, UK.
18 Department of Pediatrics, The Hospital for Sick Children, Toronto, Ontario, Canada.
19 Division of Regenerative Medicine, Department of Medicine, University of California, San Diego, San Diego, CA, USA.
20 Department of Pediatrics, University of Cambridge and Wellcome Trust-MRC Stem Cell Institute, Cambridge, UK.
21 The Preston Robert Tisch Brain Tumour Center, Duke Cancer Center, Durham, NC, USA.
22 The Arthur and Sonia Labatt Brain Tumour Research Centre, and Division of Neurosurgery, The Hospital for Sick Children, Toronto, Ontario, Canada.
23 CRUK Cambridge Institute, Li Ka Shing Centre, Cambridge, UK. richard.gilbertson@cruk.cam.ac.uk.
24 CRUK Cambridge Institute and Department of Oncology, University of Cambridge, Hutchison/MRC Research Centre, Cambridge Biomedical Campus, Cambridge, UK. richard.gilbertson@cruk.cam.ac.uk.