1. Copenhagen Center for Arthritis Research, Center for Rheumatology and Spine Diseases, Center of Head and Orthopedics, Rigshospitalet, Glostrup, Denmark
2. Faculty of Health and Medical Sciences, Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
3. The DANBIO Registry, Center for Rheumatology and Spine Diseases, Center of Head and Orthopedics, Rigshospitalet, Glostrup, Denmark
4. Danish Hospital for Rheumatic Diseases, University Hospital of Southern Denmark, Sønderborg, Denmark
5. Department of Rheumatology, Odense University Hospital, Institute of Clinical Research, University of Southern Denmark, Denmark
6. Augurex Life Sciences Corp, Vancouver, British Columbia, Canada
7. Department of Rheumatology, Aarhus University Hospital, Aarhus, Denmark