1. Department of Clinical Microbiology and Microbial Pathogenesis, University Hospital of Heraklion, 71110 Heraklion, Greece
2. Department of Pediatric Hematology-Oncology, Laboratory of Blood Diseases and Childhood Cancer Biology, University Hospital of Heraklion, Medical School, University of Crete, 71003 Heraklion, Greece
3. Department of Pediatrics, Agios Nikolaos General Hospital, 72100 Agios Nikolaos, Greece