1. Department of Neurosurgery, Memorial Sloan-Kettering Cancer Center, New York, New York, USA
2. Department of Radiation Oncology, University of Washington School of Medicine, Seattle, Washington, USA
3. Department of Radiation Oncology, University of Southern California, Los Angeles, California, USA
4. Department of Neurosurgery, University of Virginia Health System, Charlottesville, Virginia, USA
5. Department of Radiation Oncology, University Hospital Zurich, Zurich, Switzerland
6. Department of Neurosurgery, Neuroscience & Radiosurgery Hybrid Research Center, Inje University Ilsan Paik Hospital, Goyang, Korea
7. Department of Radiation Oncology, Stony Brook University, Stony Brook, New York, USA
8. Department of Radiation Oncology, University of Queensland, Princess Alexandra Hospital, Brisbane, Australia
9. Department of Neurosurgery, University of Munich Hospital, Munich, Germany
10. Department of Radiation Oncology, Stanford University Medical Center, Stanford, California, USA
11. Department of Radiation Oncology, Rose Ella Burkhardt Brain Tumor and Neuro-oncology Center, Cleveland Clinic, Cleveland, Ohio, USA
12. NCIC Canadian Cancer Trials Group, Kingston, Ontario, Canada
13. Department of Neurosurgery, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA
14. Department of Radiology, Memorial Sloan-Kettering Cancer Center, New York, New York, USA
15. Department of Medical Imaging, University of Toronto, Sunnybrook Odette Cancer Centre, Toronto, Ontario, Canada
16. Department of Orthopedics, University of British Columbia, Vancouver, British Columbia, Canada
17. Department of Neurosurgery, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
18. Department of Orthopedic Surgery, University Medical Center Utrecht, Utrecht, Netherlands
19. Division of Neuro-Oncology, University of Virginia Health System, Charlottesville, Virginia, USA
20. Department of Neurosurgery, Toronto Western Hospital, Toronto, Ontario, Canada
21. Department of Radiation Oncology, University of California San Francisco, San Francisco, California, USA
22. Department of Neurosurgery, University of California San Francisco, San Francisco, California, USA
23. Brain Tumor and Neuro Oncology Center and Department of Neurosurgery, Cleveland Clinic, Cleveland, Ohio, USA
24. Department of Radiation Oncology, University of Toronto, Sunnybrook Odette Cancer Centre, Toronto, Ontario, Canada