1. Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands
2. Zuyderland Medical Center, Heerlen, the Netherlands
3. Department of Rheumatology, Henri Mondor Hospital, APHP, Créteil, France
4. Université Paris Est Créteil, EA 7379 – EpidermE, Créteil, France
5. NOVA Medical School, Universidade Nova de Lisboa, Portugal
6. Department of Rheumatology, Paris Descartes University, Hôpital Cochin, Hôpitaux de Paris, France
7. INSERM (U1153), Clinical Epidemiology and Biostatistics, PRES Sorbonne Paris-City, France
8. Department of Radiology, Paris Descartes University, Paris, France
9. Department of Rheumatology, Ambroise Paré Hospital APHP, Boulogne-Billancourt, France
10. INSERM U1173, Laboratoire d’Excellence INFLAMEX, UFR Simone Veil, Université Versailles-Saint Quentin en Yvelines, Saint-Quentin en Yvelines, France
11. Department of Rheumatology, University of Nancy, Nancy, France
12. Department of Radiology, Leiden Univeristy Medical Center, Leiden, the Netherlands