1 Second Department of Neurology, Attikon Hospital, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece.
2 Iatropolis Magnetic Resonance Diagnostic Centre, Athens, Greece.
3 Stroke Unit, Metropolitan Hospital, Piraeus, Greece.
4 Department of Neurology, The University of Tennessee Health Science Center, Memphis, TN, USA.
5 International Clinical Research Center, Department of Neurology, St. Anne's University Hospital in Brno, Brno, Czech Republic. tsivgoulisgiorg@yahoo.gr.