1. Department of Neurosurgery, Hospital Clínico Regional de Concepción, Concepción, Chile
2. Faculty of Medicine, University of Concepción, Concepción, Chile
3. Department of Neurosurgery, Emory University, Atlanta, GA, USA
4. Orthopaedic Research Group, Coimbatore, India
5. Department of Orthopaedics, Government Medical College, Karur, India
6. Department of Biotechnology, Faculty of Engineering, Karpagam Academy of Higher Education, Coimbatore, India
7. Department of Orthopedics, Emory University, Atlanta, GA, USA
8. Spine Center and Department of Orthopedic Surgery, Seoul National University Bundang Hospital and Seoul National University College of Medicine, Seoul, Republic of South Korea
9. Department of Orthopedic Surgery, Icahn School of Medicine at Mount Sinai, New York, NY, USA
10. Spinal Surgery Division, Department of Traumatology, University Hospital Centre Sestre Milosrdnice, Zagreb, Croatia
11. Department of Anatomy and Physiology, University of Applied Health Sciences, Zagreb, Croatia
12. Department of Orthopaedics, University of Toronto, University Health Network, Toronto Western Hospital, Toronto, ON, Canada
13. Department of Orthopaedic Surgery, The University of Tokyo, Tokyo, Japan
14. Gerling Institute, Brooklyn, NY, USA
15. Department of Orthopedic Surgery, NYU Grossman School of Medicine, New York, USA
16. USC Spine Center, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
17. Department of Neurological Surgery, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA