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 Hospital, School of Medicine, National and Kapodistrian University of Athens, 11528 Athens, Greece
3. Research Unit of Radiology, Second Department of Radiology, School of Medicine, National and Kapodistrian University of Athens, 11528 Athens, Greece
4. MS Center and Other Neurodegenerative diseases, Metropolitan General Hospital, 15562 Holargos, Athens, Greece