1. Center for Rheumatology and Clinical Immunology, Division of Medicine, Turku University Hospital, Turku
2. Department of Internal Medicine, University of Turku, Turku
3. Department of Radiology, Turku University Hospital, Turku
4. Department of Rheumatology, Helsinki University Hospital, Helsinki
5. Department of Oncology and Radiotherapy, Turku University Hospital, Turku
6. Department of Clinical Microbiology and Immunology, Turku University Hospital, Turku, Finland