1. National and Kapodistrian University of Athens, School of Medicine, Evangelismos Hospital, First Department of Neurosurgery, Athens, Greece.
2. Aristotle University of Thessaloniki, Faculty of Philosophy, School of Psychology, Thessaloniki, Greece.
3. University Hospital of Patras, School of Medicine, Departments of Neurology and Psychiatry, Patras, Greece.
4. University of Ioannina, School of Health Sciences, Department of Speech and Language Therapy, Ioannina, Greece.
5. Aristotle University of Thessaloniki, Faculty of Health Sciences, School of Medicine, 1st Department of Neurology, Thessaloniki, Greece.