1. Hospital for Special Surgery/Weill Cornell MedicineNew York New York
2. OrthoCarolina Hip and Knee CenterCharlotte North Carolina
3. McMaster UniversityHamilton Ontario Canada
4. Mayo ClinicRochester Minnesota
5. Louisiana State UniversityNew Orleans
6. University of PennsylvaniaPhiladelphia
7. University of MichiganAnn Arbor
8. Columbia UniversityNew York New York
9. Albert Einstein College of MedicineBronx New York
10. Kaiser PermanenteFontana California
11. Cleveland ClinicCleveland Ohio
12. Midwest Orthopaedics at RushChicago Illinois
13. University of Texas Medical BranchGalveston
14. American College of RheumatologyAtlanta Georgia
15. Rothman Institute, Thomas Jefferson University HospitalPhiladelphia Pennsylvania
16. University of UtahSalt Lake City
17. University of PittsburghPittsburgh Pennsylvania
18. Rockefeller UniversityNew York New York
19. Brigham and Women's HospitalBoston Massachusetts
20. National Data Bank for Rheumatic Diseases, Wichita, Kansas and University of Nebraska Medical CenterOmaha
21. University of Nebraska Medical CenterOmaha
22. Dearborn‐Sah Institute for Joint RestorationFremont California
23. University of Alabama at Birmingham