1. Department of Radiology, Aarhus University Hospital, Aarhus, Denmark
2. Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
3. Institute of Regional Health Research, University of Southern Denmark, Odense, Denmark
4. Department of Rheumatology, Aarhus University Hospital, Aarhus, Denmark
5. Danish Hospital for Rheumatic Diseases, Sønderborg, Denmark
6. Research Department, Spine Centre of Southern Denmark, Hospital Lillebaelt, Middelfart, Denmark