1. Stroke Unit, Metropolitan Hospital, Piraeus, Greece (O.K., K.P., A.S., A.A., A.E., G.M.).
2. Second Department of Neurology, National and Kapodistrian University of Athens, “Attikon” University Hospital, Greece (A.S., A.E., G.T.).
3. Second Department of Radiology, Interventional Radiology Unit, “Attikon” University Hospital, Athens, Greece (S.S.).