1 Stroke Unit, Metropolitan Hospital, Piraeus, Greece.
2 Stroke Unit, Department of Neurology, Brugmann University Hospital, Bruxelles, Belgium.
3 Second Department of Neurology, "Attikon" Hospital, School of Medicine, University of Athens, Athens, Greece.
4 Department of Neurology, School of Medicine, University of Ioannina, Ioannina, Greece.
5 Department of Neurology, The University of Tennessee Health Science Center, Memphis, Tennessee, United States of America.
6 Department of Neurology, International Clinical Research Center, St. Anne's University Hospital in Brno, Brno, Czech Republic. tsivgoulisgiorg@yahoo.gr.