1. Department of Pathology St. Jude Children's Research Hospital 262 Danny Thomas Place Memphis TN38105USA
2. Center for Cancer Research Laboratory of Pathology National Cancer Institute Bethesda MDUSA
3. Department of Neuropathology Charité Universitätsmedizin Berlin Germany
4. Brain Tumor Center Division of Oncology Cincinnati Children's Hospital Medical Center University of Cincinnati College of Medicine Cincinnati OHUSA
5. Neuro‐Oncology Branch National Cancer InstituteNational Institutes of Health Bethesda MDUSA
6. Department of Oncology Cambridge Cancer Centre Robinson Way CambridgeCB2 0REUK
7. Division of Pathology The Hospital for Sick Children Toronto Ontario Canada
8. Department of Radiation Oncology St. Jude Children's Research Hospital 262 Danny Thomas PlaceMS 210 Memphis TN38105USA
9. Division of Pediatric Neurooncology German Cancer Consortium (DKTK) German Cancer Research Center (DKFZ) Heidelberg Germany
10. Department of Pathology University of Michigan Ann Arbor MI48109USA
11. Department of Pathology Massachusetts General Hospital Harvard Medical School Boston MA02114USA