1. Departments of Neurosurgery and Orthopedics, Division of Spine, Duke University Medical Center, Durham, North Carolina;
2. Department of Neurosurgery, University of California, San Francisco, California;
3. Department of Neurological Surgery, Rush University Medical Center, Chicago, Illinois
4. Department of Neurosurgery, University of Michigan, Ann Arbor, Michigan;
5. Barrow Neurological Institute, Phoenix, Arizona;
6. Department of Orthopedic Surgery, Scripps Clinic, La Jolla, California;
7. Department of Neurosurgery, Cornell Medical Center, New York, New York;
8. Department of Neurosurgery, University of Miami, Florida;
9. Department of Orthopaedics, Cedars-Sinai Medical Center, Los Angeles, California;
10. Department of Orthopedics, New York University Langone Health, New York, New York;
11. Department of Neurosurgery, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania;
12. Spine Institute of Louisiana, Shreveport, Louisiana; and