1. Central Laboratories, IASO Gynecology, Maternity and Pediatric Hospital, Iaso Group Hospitals, Athens, Greece
2. Department of Microbiology, Medical School, National and Kapodistrian University of Athens, Goudi, Athens, Greece
3. Neonatal Intensive Care Unit, IASO Paediatric Hospital, Maroussi, Athens, Greece
4. Department of Medicine - Infectious Diseases, IASO Group Hospitals, Athens, Greece