1. Department of Rheumatology, Bone and Joint Research Unit. Hospital Universitario Fundación Jiménez Díaz, IIS Fundación Jiménez Díaz, and Universidad Autónoma de Madrid, Madrid, Spain
2. Rheumatology Department, La Princesa University Hospital, Princesa Health Research Institute, Madrid, Spain
3. Copenhagen Center for Arthritis Research, Center for Rheumatology and Spine Diseases, Rigshospitalet, Glostrup, Denmark; Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
4. Department of Health Science – DISSAL, University of Genova, Italy
5. UO Radiologia, IRCCS Policlinico San Martino, Genova, Italy
6. Department of Radiology, Medical University Innsbruck, Section Head Rheumatology and Sports Imaging, Innsbruck, Austria
7. Clinic for Rheumatology and Clinical Immunology, Asklepios Clinic, Bad Abbach, Germany
8. Department of Rheumatology, Diakonhjemmet Hospital and Faculty of Medicine, University of Oslo, Oslo, Norway
9. Department of Radiological, Oncological and Anatomo-pathological Sciences, “Sapienza” University, Rome, Italy
10. Sf. Maria Hospital, Rheumatology Department, Bucharest, Romania
11. Department of Rheumatology Hospital Universitario Móstoles, Universidad Rey Juan Carlos, Madrid, Spain
12. Department of Internal Disease Propaedeutic and Clinical Rheumatology, Medical University of Plovdiv, Plovdiv, Bulgaria
13. Orthopedics and Trauma Surgery, Praxis, Hamburg, Germany
14. Department of Radiology, National Institute of Geriatrics, Rheumatology and Rehabilitation, Warsaw, Poland
15. Paediatric Imaging Department, “Reine Fabiola” Childrenʼs University Hospital, Université Libre de Bruxelles, Brussels, Belgium
16. 2nd Internal Medicine Department, “Iuliu Hatieganu” University of Medicine and Pharmacy, Cluj-Napoca, Romania
17. IRCCS Istituto Ortopedico Galeazzi, Milano Italy
18. Department of Biomedical Sciences for Health, University of Milano, Milano, Italy
19. Department of Anaesthesiology, Hospital Clinic, Department of Human Anatomy, Faculty of Medicine, University of Barcelona, Spain
20. Ultrasound Unit, Private Radiological Institution, Athens, Greece
21. Department of Physical and Rehabilitation Medicine, Hacettepe University Medical School, Ankara, Turkey
22. Institute of Infection, Immunity and Inflammation, College of Medical Veterinary and Life Sciences, University of Glasgow, Glasgow, United Kingdom
23. Instituto Poal de Reumatologia Barcelona, EULAR Working Group Anatomy for the Image, University of Barcelona, International University of Catalunya, Spain
24. Rheumatology Division, 2nd Rehabilitation Department, Rehabilitation Clinical Hospital Cluj-Napoca, Romania
25. Department of Dermatology. Hospital Universitario Fundación Jiménez Díaz.Madrid, Spain
26. Division of Rheumatology, Medical University of Vienna, Vienna, Austria
27. UOC Clinica Pediatrica e Reumatologia, IRCCS Istituto Giannina Gaslini, Department of Neurosciences, Rehabilitation, Ophthalmology, Genetic and Maternal Infantile Sciences (DINOGMI) University of Genoa, Genoa, Italy
28. Radiology Department, “Iuliu Hatieganu” University of Medicine and Pharmacy, Cluj-Napoca, Romania
29. Department of Anaesthesiology, Division of Pain Medicine, University Hospital Heidelberg, Heidelberg, Germany
30. Department of Anaesthesiology and Intensive Care Medicine, Cork University Hospital and University College Cork, Cork, Ireland
31. Orthopedic Department, Clinica Pakea de Mutualia, San Sebastián, Spain.
32. Istituto di Reumatologia Università Cattolica del Sacro Cuore, UOC Reumatologia, Fondazione Policlinico Universitario Agostino Gemelli, IRCCS, Rome, Italy
33. Rheumatology Department, Transitional Care Clinic, Hospital Universitario Severo Ochoa, Madrid, Spain
34. Department of Musculoskeletal Radiology, Hospital Universitario Fundación Alcorcón, Madrid, Spain
35. Dermatology Department, Hospital Universitario Puerta de Hierro Majadahonda, Madrid, Spain