1. Department of Neurosurgery, Clinical Neuroscience Center, University of Utah, Salt Lake City, Utah, USA
2. Cooper Neuroscience Institute, Camden, New Jersey, USA
3. Neurosurgical Service, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA
4. Department of Neurosurgery, NYU Langone Medical Center, New York, New York, USA
5. Department of Neurosurgery, Baylor College of Medicine, Houston, Texas, USA
6. Departments of Neurosurgery and Radiology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, New York, USA
7. Department of Neurosurgery, Medical University of South Carolina, Charleston, South Carolina, USA
8. Department of Neurological Surgery, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA
9. Department of Neurosurgery, Emory University, Atlanta, Georgia, USA
10. Department of Neurosurgery, University of California-San Diego, La Jolla, California, USA
11. Department of Neurosurgery, University of Michigan, Ann Arbor, Michigan, USA
12. Mayfield Clinic, TriHealth Neuroscience Institute, Good Samaritan Hospital, Cincinnati, Ohio, USA
13. Lyerly Neurosurgery, Baptist Neurological Institute, Jacksonville, Florida, USA
14. Department of Neurosurgery, Lenox Hill Hospital, New York, New York, USA
15. Department of Neurological Surgery, University of Washington, Harborview Medical Center, Seattle, Washington, USA
16. Department of Neurosurgery, Global Neurosciences Institute Drexel University College of Medicine, Philadelphia, Pennsylvania, USA
17. Department of Neurosurgery, University of Texas Medical Branch, Galveston, Texas, USA