1. Second Department of Psychiatry, University of Athens, ‘ATTIKON’ University Hospital, 12462 Athens, Greece
2. Department of Cardiothoracic Surgery, University Hospital of Wales, Cardiff CF14 4XW, UK
3. Medical Center of Athens, 15125 Athens, Greece
4. Neurophysiology Department, South Tyneside and Sunderland NHS Foundation Trust, Sunderland SR47TP, UK
5. Metropolitan Hospital of Athens, 18547 Athens, Greece
6. King's College London, Institute of Psychiatry, Psychology and Neuroscience, London SE5 8AF, UK
7. Laboratory of Clinical Virology, School of Medicine, University of Crete, 71003 Heraklion, Greece
8. Medical School of Athens, National and Kapodistrian University of Athens, 11527 Athens, Greece