1. Swedish Neuroscience Institute, Swedish Medical Center - Cherry Hill Campus, Seattle, WA, USA
2. Seattle Science Foundation, Seattle, WA, USA
3. Department of General and Trauma Surgery, Berufsgenossenschaftliches Universitätsklinikum Bergmannsheil, Bochum, Germany
4. Department of Orthopedics and Trauma Surgery, Katholisches Klinikum Bochum - St. Josef Hospital, Ruhr University Bochum, Bochum, German
5. Spine Surgery, Sonnenhof Clinic Orthopaedic Department, Bern, Switzerland
6. Department of Orthopaedics, Universitair Medisch Centrum Utrecht, Utrecht, Netherlands
7. Center for Spinal Surgery, BG Unfallklinik Frankfurt am Main, Frankfurt, Germany
8. Department of Orthopaedic Surgery, Rothman Institute and Thomas Jefferson University, Philadelphia, USA
9. Center for Spine and Scoliosis Surgery, Malteser Waldkrankenhaus St Marien gGmbH, Erlangen, Germany
10. Department of Orthopaedics, The University of British Columbia, Vancouver, BC, Canada
11. Spine Surgery, Ganga Medical Centre and Hospitals Pvt Ltd, Coimbatore, India
12. Department of Orthopaedic and Trauma Surgery, Assiut University, Assiut, Egypt
13. Rothman Orthopaedic Institute, Philadelphia, PA, USA
14. Department of Orthopaedics, University of Washington, Seattle, WA, USA
15. Complex Spine Surgery, Swedish Neuroscience Institute, Seattle, WA, USA