1. Washington University School of Medicine, St. Louis, Missouri (A.H.K.)
2. Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts (J.A.S.)
3. University of Washington, Seattle, Washington (J.W.L.)
4. Northwestern Medicine, Chicago, Illinois (M.S.P.)
5. Sorbonne University, Inserm CRSA, AP-HP Saint-Antoine Hospital, Paris, France (F.B.)
6. Mayo Clinic, Rochester, Minnesota (A.D.)
7. Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts (E.R.G.)
8. University Medical Center Göttingen, Göttingen, Germany (P.K.)
9. Hospital for Special Surgery, New York, New York (S.E.S.)
10. McMaster University, Hamilton, and Canadian Arthritis Patient Alliance, Toronto, Ontario, Canada (E.S.)
11. School of Medicine, Universidad Científica del Sur and Hospital Nacional Guillermo Almenara Irigoyen, EsSalud, Lima, Peru (M.F.U.)
12. University of Cape Town, Cape Town, South Africa, and the Francis Crick Institute, London, United Kingdom (K.W.)
13. University of Otago, Wellington, New Zealand (R.G.)