1. Second Department of Neurology, “Attikon” University Hospital, School of Medicine, National and Kapodistrian University of Athens, 12462 Athens, Greece
2. First Department of Neurology, “Eginition” University Hospital, School of Medicine, National & Kapodistiran University of Athens, 12462 Athens, Greece
3. Second Department of Neurology, AHEPA University Hospital, School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, 54636 Thessaloniki, Greece