1. Department of Neurologic Surgery, University of Virginia Health System, Charlottesville, Virginia;
2. Department of Neurologic Surgery, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania;
3. Department of Neurosurgery, Neurologic Institute, Taipei Veterans General Hospital, Taipei, Taiwan, Republic of China;
4. Third Department of Internal Medicine, First Faculty of Medicine of the Charles University and General Teaching Hospital, Prague, Czech Republic;
5. Neurosurgery Department, Gamma Knife Center Cairo–Nasser Institute, Benha University, Benha, Egypt;
6. Neurosurgery Department, Gamma Knife Center Cairo–Nasser Institute, Ain Shams University, Cairo, Egypt;
7. Clinical Oncology Department, Gamma Knife Center Cairo–Nasser Institute, Ain Shams University, Cairo, Egypt;
8. Department of Functional Neurosurgery and Radiosurgery, Ruber International Hospital, Madrid, Spain;
9. Division of Neurosurgery, Université de Sherbrooke, Centre de recherche du CHUS, Sherbrooke, Quebec, Canada;
10. Department of Neurosurgery, University of Pennsylvania, Philadelphia, Pennsylvania;
11. Department of Radiation Oncology, Beaumont Health System, Royal Oak, Michigan;
12. Department of Neurosurgery, New York University Langone Medical Center, New York, New York;
13. Department of Stereotactic and Radiation Neurosurgery, Na Homolce Hospital, Prague, Czech Republic; and
14. Department of Medicine, University of Virginia Health System, Charlottesville, Virginia