1. Department of Ophthalmology, University Hospital of Heraklion, Heraklion 71500, Greece
2. Clinic of Social and Family Medicine, School of Medicine, University of Crete, Heraklion 71500, Greece
3. Department of Social Work, Hellenic Mediterranean University, Heraklion 71410, Greece
4. 4th Local Health Team, Academic Unit of Heraklion, Heraklion 71303, Greece
5. Laboratory of Clinical Virology, School of Medicine, University of Crete, Heraklion 71500, Crete, Greece