1. Infectious Disease Unit, Department of Internal Medicine, University Hospital of Heraklion, 71 110 Heraklion, Crete, Greece
2. Department of Clinical Microbiology, University Hospital of Heraklion, 71 110 Heraklion, Crete, Greece
3. Department of Medical Oncology, University Hospital of Heraklion, 71 110 Heraklion, Crete, Greece