1. Rheumatology Department, University Hospital 12 de Octubre, Madrid, Spain
2. Musculoskeletal Health Institute, Madrid, Spain
3. Rheumatology Department, University Hospital Puerta de Hierro, Madrid, Spain
4. Department of Rheumatology, University of Lübeck, Lübeck, Germany
5. Rheumatology Unit, Department of Internal Medicine Clinical and Experimental ‘F Magrassi-A-Lanzara’, Second University of Naples, Naples, Italy
6. B Shine Rheumatology Unit, Rambam Health Care Campus and Rappaport Faculty of Medicine-Technion, Haifa, Israel
7. Rheumatology and Clinical Immunology Unit, Civil Hospitali, Brescia, Italy
8. Rheumatology Department, Felix Platter Hospital, Basel, Switzerland
9. University of Belgrade School of Medicine, Belgrade, Serbia
10. Division of Rheumatology, Department of Clinical and Experimental Medicine, University of Florence, Florence, Italy
11. Institute of Rheumatology, Russian Academy of Medical Science, Moscow, Russia
12. Rheumatology Clinic, University of Medicine and Pharmacy ‘Iuliu Hatieganu’ Cluj, Cluj-Napoca, Romania
13. Department of Immunology and Rheumatology, Faculty of Medicine, University of Pécs, Pécs, Hungary
14. Division of Rheumatology, University Hospital Zürich, Zürich, Switzerland
15. Department of Internal Medicine, Saint-Louis Hospital, Paris, France
16. Department of Rheumatology, Lund University Hospital, Lund, Sweden
17. Rheumatology Unit, University of Foggia, ‘Col. D’Avanzo’ Hospital, Foggia, Italy
18. Rheumatology Unit, AOUI, Verona, Italy
19. Rheumatology Unit, Department of Medicine, Chris Hani Baragwanath Hospital and University of the Witwatersrand, Johannesburg, South Africa
20. Rheumatology A Department, Cochin Hospital, APHP, Paris Descartes University, Paris, France