1. National Institute of Arthritis and Musculoskeletal and Skin Diseases Bethesda Maryland
2. Oregon Health & Science University Portland
3. University of California San Francisco
4. Boston University School of Medicine Boston Massachusetts
5. University of California Los Angeles
6. Case Western Reserve University Cleveland Ohio
7. University of TorontoKrembil Research InstituteToronto Western Hospital Toronto Ontario Canada
8. Arthritis & Rheumatism Associates Washington DC
9. Columbia University Medical Center New York New York
10. VA West Los Angeles Medical Center Los Angeles California
11. Arthritis and Rheumatism Associates Wheaton Maryland
12. University of Mississippi Medical Center Jackson
13. University of Washington Seattle
14. Seattle Washington
15. Pianin and Associates, PC Phoenix Arizona
16. American College of Rheumatology Atlanta Georgia
17. ECRI Institute Plymouth Meeting Pennsylvania
18. University of Alberta Edmonton Alberta Canada
19. Rocky Mountain Regional VA Medical Center and University of Colorado Aurora