1. Research Department, AO Spine, AO Foundation, Davos, Switzerland
2. Department of Orthopaedics & Traumatology, The University of Hong Kong, Hong Kong
3. Department of Orthopaedic and Trauma Surgery, Tampere University Hospital, Tampere, Finland
4. Department of Orthopaedics, University Medical Center Utrecht, Utrecht, The Netherlands
5. Division of Spine, Department of Orthopaedics, University of British Columbia,Vancouver General Hospital Vancouver, BC, Canada
6. Department of Orthopaedics, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
7. Department of Orthopaedics, College of Medicine, King Saud University, Riyadh, Saudi Arabia
8. Department of Neurosurgery, Zucker School of Medicine at Hofstra, Northwell Health, Long Island Jewish Medical Center, North Shore University Hospital, Manhasset, NY, USA
9. Department of Orthopaedics, University of Toronto, University Health Network, Toronto Western Hospital Toronto, ON, Canada
10. Department of Neurosurgery, Division of Surgery, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
11. Department of Orthopaedics, Emory University, Atlanta, GA, USA
12. AO Research Institute, Davos, Switzerland
13. Department of Orthopaedic Surgery, Rush University Medical Center, Chicago, IL, USA