1. Department of Neurological Surgery, University of Virginia, Charlottesville, Virginia;
2. Gamma Knife Center Cairo;
3. Nasser Institute, Department of Neurosurgery, Benha University, Qalubya;
4. Departments of Neurosurgery and
5. Clinical Oncology, Ain Shams University, Cairo;
6. Department of Radiation Oncology, National Cancer Institute, Cairo University, Cairo, Egypt;
7. Department of Neurosurgery, Koc University School of Medicine, Istanbul, Turkey;
8. Rose Ella Burkhardt Brain Tumor and Neuro-Oncology Center, Neurological Institute, Cleveland Clinic, Cleveland, Ohio;
9. Department of Radiology, Dominican Gamma Knife Center and CEDIMAT, Santa Domingo, Dominican Republic;
10. Radiation Therapy, Postgraduate Institute of Medical Education and Research, Chandigarh, India;
11. Department of Neurosurgery, Penn State Health-Hershey Medical Center, Hershey, Pennsylvania;
12. Department of Radiosurgery, Rúber International Hospital, Madrid, Spain;
13. Division of Neurosurgery, Université de Sherbrooke, Centre de recherche du CHUS, Sherbrooke, Quebec, Canada;
14. Department of Neurological Surgery, Emory University, Atlanta, Georgia;
15. Radiation Oncology, West Virginia University, Morgantown, West Virginia;
16. Department of Neurosurgery, University of Pittsburgh, Pittsburgh, Pennsylvania; and
17. Department of Neurosurgery, University of Alberta, Edmonton, Alberta, Canada