1. Florida Spine Specialists, Fort Lauderdale, FL, USA
2. Broward Health Medical Center, Fort Lauderdale, FL, USA
3. Nova Southeastern University, Fort Lauderdale, FL, USA
4. Washington University, St Louis, MO, USA
5. University of Arkansas for Medical Sciences, Little Rock, AR, USA
6. Norton Leatherman Spine Center, Louisville, KY, USA
7. Chulalongkorn University, Pathumwan, Bangkok, Thailand
8. King Chulalongkorn Memorial Hospital, Pathumwan, Bangkok, Thailand
9. Northwestern University, Feinberg School of Medicine, Chicago, IL, USA
10. Mayo Clinic, Rochester, MN, USA
11. Springfield Clinic, LLP, Springfield, IL, USA
12. Southern Illinois University, Springfield, IL, USA
13. Duke University Medical Center, Durham, NC, USA
14. University of Virginia, Charlottesville, VA, USA
15. USC Spine Center, Los Angeles, CA, USA
16. University of California, Los Angeles, Santa Monica, CA, USA
17. University of Southern California, Los Angeles, CA, USA
18. Kansas University Medical Center, Kansas City, KS, USA
19. Toronto Western Hospital, Toronto, Ontario, Canada
20. Cleveland Clinic, Cleveland, OH, USA
21. Columbia University, New York, NY, USA
22. New York-Presbyterian/The Allen Hospital, New York, NY, USA