1. Hospital for Special Surgery and Weill Cornell Medicine New York New York
2. Oklahoma Medical Research Foundation Oklahoma City
3. American University of Beirut Beirut Lebanon
4. Johns Hopkins Medicine Baltimore Maryland
5. Cleveland Clinic Foundation Cleveland Ohio
6. Toronto Western Hospital, Mount Sinai Hospital, and University of Toronto Toronto Ontario Canada
7. Columbia University Irving Medical Center New York New York
8. Oregon Health & Science University Portland
9. VA North Texas Health Care System and University of Texas Southwestern Medical Center Dallas
10. Brigham and Women's Hospital and Harvard Medical School Boston Massachusetts
11. Children's Hospital, London Health Sciences Centre London Ontario Canada
12. University of Massachusetts Chan Medical School Worcester
13. University of Alabama at Birmingham
14. University of Iowa Carver College of Medicine Iowa City
15. Greenbelt Maryland
16. Athens Ohio
17. The Ohio State University and Nationwide Children's Hospital Columbus
18. Florida State University College of Medicine Tallahassee
19. Baylor College of Medicine Houston Texas
20. The Permanente Medical Group Union City California
21. Brown University, Brown Physicians Inc., and Providence Veterans Affairs Medical Center East Providence Rhode Island
22. ECRI Institute, Plymouth Meeting Pennsylvania
23. University of California Irvine Medical Center Orange
24. Dalhousie University and QEII Health Sciences Centre Halifax Nova Scotia Canada
25. Boston Children's Hospital Boston Massachusetts
26. Georgetown University Hospital Washington DC
27. Duke University Durham North Carolina
28. University of Washington Seattle
29. British Columbia Children's Hospital Vancouver British Columbia Canada
30. American College of Rheumatology Atlanta Georgia