1. Santa Monica Orthopaedic and Sports Medicine Foundation, Santa Monica, California - USA
2. Sterling Ridge Orthopaedics and Sports Medicine, Sterling Ridge, Texas - USA
3. Keck School of Medicine, University of Southern California, Los Angeles, California - USA
4. Medical Center of McKinney, McKinney, Texas - USA
5. Department of Health Science, University of Glasgow, Glasgow, Scotland - UK
6. Department of Orthopaedic Surgery, University of Southern California, Los Angeles, California - USA