1. Department of Neurology; Istanbul Faculty of Medicine; Istanbul University; Istanbul; Turkey
2. Department of Neurology; Helsinki University Central Hospital; Helsinki; Finland
3. Department of Neurology; University of Bergen-Haukeland Hospital; Bergen; Norway
4. Department of Neurology; University of Athens Medical School; Eginition Hospital; Athens; Greece
5. Department of Neurology; Lille University Hospital; Lille; France
6. Department of Neurology; Vaudois University Hospital-CHUV; Lausanne; Switzerland
7. Department of Neurology; University of Debrecen; Debrecen; Hungary
8. Department of Neurology; Basel University Hospital; Basel; Switzerland
9. Department of Neurology; University of Heidelberg; Heidelberg; Germany
10. Department of Neurology; Medical University of Vienna; Vienna; Austria
11. Department of Neurology; The Radboud University Nijmegen Medical Center; Nijmegen; the Netherlands
12. Department of Neurology; Ospedale Civico di Lugano; Lugano; Switzerland
13. Department of Neurology; IRCCS Fondazione Ospedale Maggiore Policlinico; University of Milan; Milan; Italy
14. Department of Neurology; Klinikum Ludwigshafen; Ludwigshafen; Germany
15. Department of Neurology; University of Athens Medical School; Alexandra Hospital; Athens; Greece