1. Departments of Orthopaedic and Neurologic Surgery, NYU Langone Orthopedic Hospital; New York Spine Institute, New York, New York, USA
2. Department of Orthopedics, Hospital for Special Surgery, New York, NY, USA
3. Department of Orthopaedic Surgery, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, USA
4. Department of Spine Surgery, Denver International Spine Clinic, Presbyterian St. Luke’s/Rocky Mountain Hospital for Children, Denver, CO, USA
5. Department of Neurosurgery, University of South Florida, Tampa, FL, USA
6. Department of Orthopaedic Surgery, Baylor Scoliosis Center, Dallas, Texas, USA
7. Department of Orthopaedic Surgery, Warren Alpert School of Medicine, Brown University, Providence, RI, USA
8. Department of Orthopaedic Surgery, Swedish Neuroscience Institute, Seattle, WA, USA
9. Department of Orthopaedic Surgery, University of Kansas Medical Center, Kansas City, Kansas, USA
10. Division of Orthopaedic Surgery, Scripps Clinic, La Jolla, California, USA
11. Department of Orthopaedic Surgery, Norton Leatherman Spine Center, Louisville, KY, USA
12. Departments of Neurosurgery and Orthopaedic Surgery, Duke University Medical Center, Durham, NC, USA
13. Department of Neurological Surgery, University of California, San Francisco, San Francisco, CA, USA
14. Department of Neurosurgery, University of Virginia, Charlottesville, VA, USA
15. Department of Orthopaedic Surgery, University of California, Davis, Davis, CA USA
16. Department of Orthopaedic Surgery, Washington University of St Louis, St. Louis, MO, USA
17. Departments of Neurosurgery, University of Pittsburgh Medical Center, Pittsburgh, PA, USA