1. Rigshospitalet, Glostrup, Denmark, and University of Copenhagen Copenhagen Denmark
2. Rigshospitalet Glostrup Denmark
3. Birthe Bonde Clinic of Physioterapy Copenhagen Denmark
4. King Christian 10th Hospital for Rheumatic Diseases Gråsten Denmark
5. University of Southern Denmark, Odense, Denmark, and Rigshospitalet Glostrup Denmark