1. Hospital for Special Surgery and Weill Cornell Medical College, Cornell University; New York New York
2. Wake Forest School of Medicine; Winston-Salem North Carolina
3. Perelman School of Medicine and Penn Musculoskeletal Center, University of Pennsylvania; Philadelphia
4. Rheumatology Research Foundation, American College of Rheumatology; Atlanta Georgia
5. University of Utah Medical Center; Salt Lake City
6. University of Maryland; Baltimore
7. Duke University School of Medicine; Durham North Carolina
8. New York University School of Medicine and Hospital for Joint Diseases; New York New York
9. State University of New York Downstate College of Medicine and VA New York Harbor Healthcare System; Brooklyn New York