1. Rheumatology Department Luigi Sacco University Hospital and Department of Clinical Sciences and Community Health, Università degli Studi di Milano Milan Italy
2. Department of Diagnostic and Interventional Radiology Lausanne University Hospital and University of Lausanne Lausanne Switzerland
3. Department of Biomedical Sciences for Health Università Degli Studi di Milano, and IRCCS Istituto Ortopedico Galeazzi Milan Italy
4. Center for Rheumatology and Spine Diseases, Rigshospitalet Copenhagen University Copenhagen Denmark
5. Rheumatology Department, Joint and Bone Research Unit Hospital Universitario Fundación Jiménez Díaz, Universidad Autónoma Madrid Spain
6. Rheumatology Department University of Lausanne, CHUV Lausanne Switzerland
7. Division of Rheumatology Instituto Nacional de Rehabilitacion Mexico City Mexico
8. Rheumatology Unit ASST Grande Ospedale Metropolitano Niguarda Milan Italy
9. Rheumatology Department Ospedale La Colletta ASL3 Genovese Genoa Italy
10. Rheumatology Department North Valley Hospital Whitefish Montana
11. Rheumatology Department CHU Montpellier, Montpellier University Montpellier France
12. Società Italiana di Reumatologia, Epidemiology Research Unit Milan Italy
13. Department of Neurosciences Physical Medicine and Rehabilitation School, University of Padova Padova Italy
14. Instituto Poal de Reumatologia University of Barcelona Barcelona Spain
15. Department of Radiology Hospital Universitario Fundación Jiménez Diáz, Universidad Autónoma Madrid Spain
16. Joint and Bone Research Unit, Rheumatology Department IIS‐Fundación Jiménez Diáz, Universidad Autónoma Madrid Spain
17. Academic Rheumatology University of Nottingham Nottingham UK
18. Division of Rheumatology, Allergy, and Immunology Massachusetts General Hospital and Harvard Medical School Boston
19. Bone and Joint Research Group, Department of Medicine, Faculty of Medical and Health Sciences University of Auckland Auckland New Zealand
20. Rheumatology Department Groupe Hospitalier de l'Institut Catholique de Lille, Lille Catholic University Lille France
21. Division of Rheumatology, Inflammation and Immunity Brigham and Women's Hospital and Harvard Medical School Boston
22. Rheumatology Department Università Cattolica del Sacro Cuore, Policlinico Universitario Agostino Gemelli IRCSS Rome Italy
23. Academic Rheumatology Centre, Department of Clinical and Biological Sciences Università degli Studi di Torino Turin Italy
24. School of Medicine, The University of Western Australia, Murdoch Perth Australia
25. Società Italiana di Reumatologia, Epidemiology Research Unit, and School of Medicine, University of Milano‐Bicocca Milan Italy
26. IRCCS Istituto Ortopedico Galeazzi, Rheumatology Department Milan Italy