1 Second Department of Neurology, National and Kapodistrian University of Athens, School of Medicine, 'Attikon' University Hospital Athens, Athens, Greece.
2 Second Department of Cardiology, National and Kapodistrian University of Athens, School of Medicine, 'Attikon' University Hospital Athens, Athens, Greece.
3 Second Department of Neurology, National and Kapodistrian University of Athens, School of Medicine, 'Attikon' University Hospital Athens, Rimini 1, Chaidari, 12462 Athens, Greece.