1. Department of Surgery, Division of Neurosurgery, Dalhousie University, Halifax, Nova Scotia, Canada;
2. Department of Surgery, Spine Surgery Program, McGill University, Montréal, Québec, Canada;
3. Spine Surgery Institute, Vancouver General Hospital, University of British Columbia, Vancouver, British Columbia, Canada;
4. Department of Neurosurgery, Spine Division, Duke University, Durham, North Carolina;
5. Department of Neurosurgery, New York University Langone Health, New York, New York;
6. Department of Neurosurgery, Massachusetts General Hospital, Harvard University, Boston, Massachusetts;
7. Department of Neurosurgery, The Warren Alpert Medical School of Brown University, Providence, Rhode Island;
8. Department of Neurosurgery, Division of Surgery, The University of Texas MD Anderson Cancer Center, Houston, Texas;
9. Department of Neurosurgery, Rush University, Chicago, Illinois;
10. Department of Neurosurgery, Zucker School of Medicine at Hofstra, Long Island Jewish Medical Center and North Shore University Hospital, Northwell Health, Manhasset, New York;
11. Department of Surgery, Division of Neurosurgery and Spine Program, University of Toronto, University Health Network, Toronto Western Hospital, Toronto, Ontario, Canada;
12. Department of Orthopaedic Surgery, Vanderbilt University Medical Center, Nashville, Tennessee;
13. Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland;
14. Department of Radiation Oncology, University of Toronto, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada;
15. Department of Orthopaedics, University Hospital Carl Gustav Carus at the TU Dresden, Dresden, Germany;
16. Department of Spine Surgery, University Hospital of Basel, Basel, Switzerland;
17. Department of Orthopedic Surgery, National University Health System, Singapore; and
18. AO Spine, AO Network Clinical Research, AO Foundation, Davos, Switzerland