1. The Arthritis Foundation, Atlanta, GA, USA
2. Duke University Hospital, Durham, NC, USA
3. Department of Orthopaedics, University of Utah, Salt Lake City, UT, USA
4. Department of Orthopaedic Surgery, University of Rochester Medical Center, Rochester, NY, USA
5. Baylor University Medical Center, Dallas, TX, USA
6. Division of Physical Medicine & Rehabilitation, University of Utah, Salt Lake City, UT, USA
7. Department of Orthopaedic Surgery, University of South Carolina, Lexington, SC, USA
8. National Pedorthic Services, Inc, Milwaukee, WI, USA
9. Department of Orthopaedics and Human Genetics, University of Utah, Salt Lake City, UT, USA
10. Department of Orthopedics and Rehabilitation, University of Iowa, Iowa City, IA, USA
11. Department of Radiology and Imaging, Hospital for Special Surgery, New York, NY, USA
12. Steadman Phillipon Research Institute, Vail, CO, USA