1. Laboratory of Haematology and Blood Bank Unit, "Attiko" Hospital, School of Medicine National and Kapodistrian University of Athens Athens Greece
2. Neonatal Intensive Care Unit, "Agios Panteleimon" General Hospital of Nikea Piraeus Greece
3. Laboratory of Reliability and Quality Control in Laboratory Hematology, Department of Biomedical Science, School of Health and Caring Science University of West Attica Athens Greece
4. Neonatal Department, National and Kapodistrian University of Athens Aretaieio Hospital Athens Greece
5. Department of Biomedical Sciences Humanitas University Milan Italy
6. IRCCS Humanitas Research Hospital Milan Italy