1. Arthritis Foundation, Atlanta, GA, USA
2. Hospital for Special Surgery, New York, NY, USA
3. Program in Physical Therapy, Washington University School of Medicine, St. Louis, MO, USA
4. UCSF School of Medicine, San Francisco CA, USA
5. Department of Radiology, NYU Grossman School of Medicine, New York, NY, USA
6. Duke University School of Medicine, Durham, NC, USA