1. Department of Rheumatology, Aalborg University Hospital, Aalborg, Denmark
2. Department of Clinical Medicine, Aalborg University, Aalborg, Denmark
3. Musculoskeletal Statistics Unit, The Parker Institute, Frederiksberg Hospital, Copenhagen, Denmark
4. The DANBIO Registry, Center for Rheumatology and Spine Diseases, Centre of Head and Orthopedics, Rigshospitalet, Glostrup, Denmark
5. Research Unit of Rheumatology, Department of Clinical Research, University of Southern Denmark, Odense University Hospital, Odense, Denmark
6. Department of Rheumatology, Aarhus University Hospital, Aarhus, Denmark
7. Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
8. Zitelab ApS, Copenhagen, Denmark
9. Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK