1. Department of Rheumatology Diakonhjemmet Hospital Oslo Norway
2. Institute of Clinical Medicine University of Oslo Oslo Norway
3. Center for Rheumatology and Spine Disease Rigshospitalet Copenhagen Denmark
4. Department of Rheumatology Leiden University Medical Center Leiden The Netherlands
5. Department of Rheumatology APHP Hôpital Ambroise Paré Boulogne‐Billancourt France
6. Department of Rheumatology MC Groep Hospitals Lelystad Netherlands
7. Department of Rheumatology Luigi Sacco University Hospital Milan Italy
8. Rheumatology Clinic Università Politecnica delle Marche Jesi (Ancona) Italy
9. Department of Clinical Epidemiology Leiden University Medical Center Leiden The Netherlands
10. Medicine & Rheumatology Unit IRCCS Istituto Ortopedico Rizzoli Bologna Italy
11. Division of Rheumatology Medical University of Vienna Vienna Austria
12. Instituto Poal University of Barcelona Barcelona Spain
13. Rheumatology and Rehabilitation Department Zagazig University Zagazig Egypt
14. Department of Rheumatology, Joint and Bone Research Unit Hospital Universitario Fundación Jiménez Díaz Madrid Spain
15. Rheumatology Unit, Azienda Ospedaliero‐Universitaria Pisana Pisa Italy
16. Department of Rheumatology, Ghent University Hospital, Ghent University Ghent Belgium
17. Academic Rheumatology Centre ‐ Dipartimento Scienze Cliniche e Biologiche, Università degli Studi di Torino Turin Italy
18. The Parker Institute, Copenhagen University Hospital Bispebjerg‐Frederiksberg Frederiksberg Denmark