1. Department of Orthopaedic Surgery Rush University Medical Center Chicago Illinois USA
2. The International Spine Research and Innovation Initiative RUSH University Medical Center Chicago USA
3. Department of Orthopaedic Surgery Hospital for Special Surgery New York New York USA
4. Research Department AO Spine International Davos Switzerland
5. Department of Orthopaedics and Traumatology The University of Hong Kong Hong Kong
6. Department of Orthopaedic and Trauma Surgery Tampere University Hospital Tampere Finland
7. Department of Orthopaedic and Trauma Surgery Assiut University Medical School Assiut Egypt
8. Department of Orthopaedics Churruca Hospital de Buenos Aires Buenos Aires Argentina
9. Department of Neurosurgery John Hopkins University Baltimore Maryland USA
10. Department of Orthopaedic Surgery University of Arizona College of Medicine Phoenix Arizona USA