1. Centre for Rheumatology and Clinical Immunology, Turku University Hospital, Turku, Finland
2. University of Turku, Turku, Finland
3. Åland’s Health Care, Mariehamn, Finland
4. TYKS Laboratories, Department of Pathology, Turku University Hospital, Turku, Finland
5. Institute of Biomedicine, University of Turku, Turku, Finland
6. Neurocenter, Turku University Hospital, Turku, Finland
7. Department of Neurology, University of Turku, Turku, Finland
8. Neuromuscular Center, Tampere University Hospital, Tampere, Finland