1 University of Bristol and Bristol Royal Infirmary, Bristol, UK.
2 VU University Medical Centre, Amsterdam, The Netherlands.
3 Johns Hopkins University, Baltimore, Maryland.
4 Global Alliance for Musculoskeletal Health/Bone and Joint Decade, Santa Barbara, California.
5 University of Ottawa, Ottawa, Ontario, Canada.
6 University of Twente, Enschede, The Netherlands.
7 Sorbonne Universités, Université Paris 6, Institut Pierre Louis d'Epidémiologie et de Santé Publique, and Pitie-Salpétrière Hospital, AP-HP, Paris, France. Members of the OMERACT Executive Committee are shown in Appendix A.