1. Neurology Department, Athens Naval Hospital, 11521 Athens, Greece
2. Neurology Department, Democritus University of Thrace, 68100 Alexandroupolis, Greece
3. Neurology Department, University of Patras, 26504 Patras, Greece
4. Neurology Department, University of Cyprus, 20537 Nicosia, Cyprus
5. Psychiatry Department, Democritus University of Thrace, 68100 Alexandroupolis, Greece
6. Department of Physical Education and Sport Science, Democritus University of Thrace, 69100 Komotini, Greece