1. Clinical Neurosciences University of Turku Turku Finland
2. Neurocenter Turku University Hospital Turku Finland
3. Department of Neurology Siun Sote North Karelia Central Hospital Joensuu Finland
4. Department of Neurology Kanta‐Häme Central Hospital Hämeenlinna Finland
5. Department of Neurology Lapland Central Hospital Rovaniemi Finland
6. Department of Human Genetics Yokohama City University Graduate School of Medicine Yokohama Japan
7. Department of Clinical Genetics Yokohama City University Hospital Yokohama Japan
8. Research Unit of Clinical Medicine, Medical Research Center Oulu Oulu University Hospital, University of Oulu Oulu Finland
9. Neurocenter, Neurology Oulu University Hospital Oulu Finland
10. Department of Neurology and Stroke Medicine Yokohama City University Graduate School of Medicine Yokohama Japan