1. The Danish Rheumatologic Biobank, the DANBIO Registry and Copenhagen Center for Arthritis Research (COPECARE), Center for Rheumatology and Spine Diseases, Centre of Head and Orthopaedics, Rigshospitalet, Glostrup, Denmark
2. Department of Rheumatology, Gentofte and Herlev Hospital, Copenhagen University Hospital, Gentofte, Denmark
3. The Danish Rheumatologic Biobank, Department of Pathology, Herlev and Gentofte Hospital, Copenhagen University Hospital, Herlev, Denmark
4. Department of Medical Biochemistry, Oslo University Hospital, Radiumhospitalet, Oslo, Norway
5. Department of Rheumatology, Zealand University Hospital, Køge, Denmark
6. Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
7. Department of Rheumatology, Aarhus University Hospital, Aarhus, Denmark
8. King Christian X’s Hospital for Rheumatic Diseases, Graasten, Denmark
9. Department of Rheumatology, Odense University Hospital, Svendborg Hospital, Svendborg, Denmark
10. Department of Rheumatology, North Denmark Regional Hospital, Hjørring, Denmark
11. Department of Rheumatology, Aalborg University Hospital, Aalborg, Denmark
12. Department of Rheumatology, Odense University Hospital, Odense, Denmark
13. Department of Rheumatology, Diakonhjemmet Hospital, Oslo, Norway
14. The Danish Rheumatologic Biobank, Herlev and Gentofte Hospital, Copenhagen University Hospital, Herlev, Denmark
15. Department of Medical Biochemistry, Oslo University Hospital, Radiumhospitalet, Norway
16. Center for Rheumatology and Spine Diseases, Institute for Inflammation Research (IIR), Rigshospitalet, Copenhagen University Hospital, Glostrup, Denmark
17. Zitelab, Copenhagen, Denmark
18. Department of Medicine and Oncology, Herlev and Gentofte Hospital, Copenhagen University Hospital, Herlev, Denmark