1. Department of Ophthalmology, University Hospital of Heraklion, Heraklion 71110, Greece
2. Department of Ophthalmology, Red Cross Hospital, Athens 11526, Greece
3. Department of Anatomy, Medical School, European University of Cyprus, Nicosia 1516, Cyprus
4. Laboratory of Clinical Virology, Medical School, University of Crete, Heraklion 71003, Greece