1. Neurology Helsinki University Hospital, and University of Helsinki Helsinki Finland
2. Neurocenter, Turku University Hospital, Clinical Neurosciences Turku University Turku Finland
3. Department of Neurology University Medicine Greifswald Greifswald Germany
4. Department of Neurology Haukeland University Hospital Bergen Norway
5. Istanbul Faculty of Medicine, Department of Neurology Istanbul University Istanbul Turkey
6. Neurology Unit Company Local Health Unit–Reggio Emilia National Institute for Research and Treatment Reggio Emilia Italy
7. Department of Neurology Oulu University Hospital Oulu Finland
8. Department of Neuroscience and Rehabilitation Tampere University Hospital Tampere Finland
9. Kuopio University Hospital, Neurocenter Neurology, Finland and University of Eastern Finland Kuopio Finland
10. Department of Neurosciences (Neurology), Hospital de Santa Maria University of Lisbon Lisbon Portugal
11. Department of Clinical Neuroscience Institute of Neuroscience and Physiology, Sahlgrenska Academy at University of Gothenburg Gothenburg Sweden
12. Department of Neurology Sahlgrenska University Hospital Gothenburg Sweden
13. Leiden University Medical Center Leiden the Netherlands
14. Department of Clinical and Experimental Sciences, Neurology Clinic University of Brescia Brescia Italy