1. Department of Surgery, University of British Columbia, Vancouver, British Columbia, Canada;
2. Departments of Neurology and Neurological Surgery, University of Washington, Seattle, Washington;
3. Department of Pediatrics, University of Utah, Salt Lake City, Utah;
4. Department of Neurology, University of Miami Miller School of Medicine, Miami, Florida;
5. Departments of Neurosurgery and
6. Neurology, Johns Hopkins University, Baltimore, Maryland;
7. Department of Neurosurgery, Center for Neurological Restoration, Cleveland Clinic, Cleveland, Ohio;
8. Neurology, New York University School of Medicine, New York, New York;
9. Department of Neurological Surgery, Columbia University Irving Medical Center, New York, New York;
10. Department of Neurosurgery, Southmead Hospital, Bristol, United Kingdom; and
11. Department of Clinical Neurosciences, Division of Neurosurgery, University of Calgary Cumming School of Medicine, Calgary, Alberta, Canada