1. Department of Internal Medicine & Infectious Diseases, University Hospital of Heraklion, Heraklion, Greece
2. Infection Control Committee, University Hospital of Heraklion, Heraklion, Greece
3. Department of Clinical Microbiology and Microbial Pathogenesis, University Hospital of Heraklion, Heraklion, Greece
4. Laboratory of Clinical Virology, School of Medicine, University of Crete, Heraklion, Greece