1. Department of Clinical Microbiology and Microbial Pathogenesis, University Hospital of Heraklion, Heraklion, Crete, Greece
2. ICU Department, University Hospital of Heraklion, Heraklion, Crete, Greece
3. Department of Infectious Diseases, The University of Texas, MD Anderson Cancer Center, Houston, Texas, USA
4. Internal Medicine Department, University Hospital of Heraklion, Heraklion, Crete, Greece