1. Medical School, National and Kapodistrian University of Athens, Athens, Greece
2. Neonatal Intensive Care Unit, “Alexandra” University and State Maternity Hospital, Athens, Greece
3. Laboratory of Health Physics, Radiobiology and Cytogenetics, National Center for Scientific Research (NCSR) “Demokritos”, Athens, Greece
4. Laboratory of Clinical Biochemistry – Molecular Diagnostics, 2nd Department of Pediatrics, National and Kapodistrian University of Athens, Athens, Greece
5. Hellenic Statistical Authority, Athens, Greece