1. Departments of Orthopedic 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 Orthopedic Surgery, Brigham and Women’s Center for Surgery and Public Health, Boston, MA
4. Department of Spine Surgery, Denver International Spine Clinic, Presbyterian St. Luke’s/Rocky Mountain Hospital for Children, Denver, CO, USA
5. Department of Orthopedics, Brown University, Warren Alpert Medical School, Providence, Rhode Island, USA
6. Department of Orthopaedic Surgery, Washington University, St. Louis, MO
7. Department of Orthopedic Surgery, San Diego Center for Spinal Disorders, La Jolla, CA
8. Department of Orthopaedic Surgery, Scripps Clinic, La Jolla, CA
9. Department of Orthopedic Surgery, Spine Institute of Louisiana, Shreveport, LA
10. Department of Neurological Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA
11. Department of Orthopaedic Surgery, Baylor Scoliosis Center, Dallas, Texas, USA
12. Department of Orthopaedic Surgery, Swedish Neuroscience Institute, Seattle, WA
13. Department of Orthopaedic Surgery, University of Kansas Medical Center, Kansas City, Kansas
14. Department of Neurosurgery, Duke University Medical Center, Durham, NC
15. Department of Neurological Surgery, University of California, San Francisco, San Francisco, CA
16. Department of Neurosurgery, University of Virginia Medical Center, Charlottesville, VA
17. Department of Orthopaedic Surgery, University of California, Davis, Davis, CA