1. Department of Rheumatology, Odense University Hospital , Odense, Denmark
2. Department of Clinical Research, University of Southern Denmark , Odense, Denmark
3. Department of Clinical Epidemiology, Aarhus University Hospital , Aarhus, Denmark
4. Department of Infectious Diseases, Copenhagen University Hospital, Rigshospitalet , Copenhagen, Denmark
5. Division of Rheumatology, Department of Internal Medicine and Department of Medicine, Faculty of Medicine, Geneva University Hospitals , Geneva, Switzerland
6. Department of Clinical Medicine, Aarhus University , Aarhus, Denmark