1. Southern California Orthopedic Institute, Van Nuys, CA, USA
2. Monterey Spine & Joint, Monterey, CA, USA
3. Chelsea Orthopedic Specialists, Chelsea, MI, USA
4. Elite Orthopaedics & Sports Medicine, Clifton, NJ, USA
5. Advanced Orthopedics of Oklahoma, Tulsa, OK, USA
6. Orthopedic Associates of Hawaii, Honolulu, HI, USA