1. Copenhagen Center for Arthritis Research, Center for Rheumatology and Spine Diseases, Rigshospitalet, Glostrup, Denmark
2. Department of Radiology, Bispebjerg-Frederiksberg Hospital, Copenhagen, Denmark
3. The Parker Institute, Bispebjerg-Frederiksberg Hospital, Copenhagen, Denmark
4. Department of Rheumatology & Inflammation Research, Institute of Medicine, The Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
5. Center for Rheumatology and Spine Diseases, Rigshospitalet, Gentofte, Denmark
6. ReumaKlinik Roskilde, Roskilde, Denmark
7. Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark