1. Copenhagen Center for Arthritis Research (COPECARE), Centre for Rheumatology and Spine Diseases, Centre of Head and Orthopaedics, Rigshospitalet, Glostrup, Denmark
2. Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
3. DANBIO Registry, Centre for Rheumatology and Spine Diseases, Centre of Head and Orthopaedics, Rigshospitalet, Glostrup, Denmark
4. Danish Cancer Society Research Center, Danish Cancer Society, Copenhagen, Denmark
5. Department of Medicine and Oncology, Herlev and Gentofte Hospital, University of Copenhagen, Herlev, Denmark
6. King Christian X Hospital for Rheumatic Diseases, South Jutland Hospital, Gråsten, Denmark
7. Department of Rheumatology, Aarhus University Hospital and lnstitute of Clinical Medicine, Aarhus University, Aarhus, Denmark
8. Department of Rheumatology, Odense University Hospital, Odense, Denmark
9. Diagnostic Centre, Silkeborg Regional Hospital, Silkeborg, Denmark
10. Department of Rheumatology, Viborg Regional Hospital, Viborg, Denmark
11. Department of Medicine, Vejle Regional Hospital, Vejle, Denmark
12. Department of Radiology, Aarhus University Hospital and Institute of Clinical Medicine, Aarhus University, Aarhus, Denmark