1. University of Washington, Seattle, WA, USA
2. Kantonspital Baselland, Liestal, Switzerland
3. Department of Orthopaedics and Rehabilitation, University of Iowa, Iowa City, IA, USA
4. Hospital for Special Surgery, New York, NY, USA
5. Washington University School of Medicine, St. Louis, MO, USA
6. Department of Orthopedic Surgery, University of Colorado School of Medicine, Aurora, CO, USA
7. Mercy Medical Center, Baltimore, MD, USA
8. New York University Grossman School of Medicine, New York, NY, USA
9. Johns Hopkins School of Medicine, Baltimore, MD, USA
10. Georgetown School of Medicine, Washington, DC, USA
11. Cedars-Sinai Medical Center, Los Angeles, CA, USA