1. DANBIO, The Danish Rheumatologic Biobank and Copenhagen Center for Arthritis Research (COPECARE), Center for Rheumatology and Spine Diseases, Centre for Head and Orthopaedics, Rigshospitalet , Glostrup, Denmark
2. Department of Clinical Medicine, University of Copenhagen , Copenhagen, Denmark
3. Copenhagen Center for Arthritis Research (COPECARE), Center for Rheumatology and Spine Diseases, Centre for Head and Orthopaedics, Rigshospitalet , Glostrup, Denmark
4. Department of Clinical Sciences Lund, Rheumatology, Skåne University Hospital, Lund University , Lund, Sweden
5. Department Rheumatology and Immunology, Inselspital—University Hospital Bern , Bern, Switzerland
6. Department of Rheumatology, Geneva University Hospital , Geneva, Switzerland
7. Center for treatment of Rheumatic and Musculoskeletal Diseases (REMEDY), Diakonhjemmet Hospital , Oslo, Norway