1. Northwestern University, Chicago, IL, USA
2. Hospital for Special Surgery, New York, NY, USA
3. Rush University Medical Center, Chicago, IL, USA
4. The International Spine Research and Innovation Initiative, Rush University Medical Center, Chicago, IL, USA
5. AO Spine International, Davos, Switzerland
6. The University of Hong Kong, Hong Kong SAR
7. Tampere University Hospital, Tampere, Finland
8. Assiut University Medical School, Assiut, Egypt
9. Churruca Hospital de Buenos Aires, Buenos Aires, Argentina
10. Johns Hopkins University, Baltimore, MD, USA
11. University of Arizona College of Medicine, Phoenix, AZ, USA