1. Rheumatology Unit, Department of Medicine at Karolinska Hospital, Stockholm, Sweden
2. Division of
3. Rheumatology
4. Endocrinology and Metabolism, Department of Internal Medicine III, University of Vienna Medical School, Austria
5. Department of Orthopaedic Surgery, Karolinska Hospital, Stockholm, Sweden
6. Division of Osteology, Department of Diagnostic Radiology, University of Vienna Medical School, Austria