1. Center for Rheumatology and Spine Diseases, Rigshospitalet, Copenhagen, Denmark
2. COPECARE, Copenhagen Center for Arthritis Research, Rigshospitalet, Copenhagen, Denmark
3. Department of Rheumatology, King Christian X Hospital, Gråsten and University of Southern Denmark, Odense, Denmark
4. Department of Rheumatology, Versailles Saint Quentin University, Ambroise-Paré Hospital, Paris, France
5. Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
6. Department of Rheumatology, Hospital Lillebælt, Vejle, Denmark
7. Department of Rheumatology, Aarhus University Hospital, Aarhus, Denmark
8. Department of Radiology, Herlev Hospital, Copenhagen, Denmark
9. Department of Radiology, Aarhus University Hospital, Aarhus, Denmark
10. Department of Clinical Medicine, Aarhus University, Aarhus, Denmark