1. Second Department of Psychiatry, Attikon University General Hospital, National and Kapodistrian University of Athens, 12462 Athens, Greece
2. Department of Basic Clinical Sciences, Medical School, University of Nicosia, 2415 Nicosia, Cyprus
3. Second Department of Neurology, School of Medicine, Attikon University General Hospital, National and Kapodistrian University of Athens, 12462 Athens, Greece
4. Laboratory of Clinical Virology, Medical School, University of Crete, 71003 Heraklion, Greece