1. Department of Neurosurgery, Northshore University HealthSystem, Evanston, Illinois;
2. Department of Neurosurgery, University of Pennsylvania, Philadelphia, Pennsylvania;
3. Department of Neurosurgery, University of Texas Medical Branch, Galveston, Texas;
4. Department of Neurosurgery, Medical University of South Carolina, Charleston, South Carolina;
5. Department of Neurosurgery, Banner University Medical Center, Phoenix, Arizona;
6. Department of Neurosurgery, Louisiana State University Health, New Orleans, Louisiana;
7. Department of Neurosurgery, Wake Forest Baptist Health, Winston-Salem, North Carolina;
8. Division of Neurosurgery, University of Chicago Medicine, Chicago, Illinois;
9. Department of Neurosurgery, Allegheny Health Network, Pittsburgh, Pennsylvania; and
10. Department of Neurosurgery, University of Utah Health, Salt Lake City, Utah