1. Department of Neurosurgery, Democritus University of Thrace, School of Health Sciences, Alexandroupolis, Greece
2. First Department of Neurology, Eginition Hospital, National and Kapodistrian University of Athens School of Medicine, Athens, Greece
3. Department of Vascular Surgery, Democritus University of Thrace, School of Health Sciences, Alexandroupolis, Greece
4. Department of Neurology, Democritus University of Thrace, School of Health Sciences, Alexandroupolis, Greece