1. Third Department of Pediatrics, National and Kapodistrian Univeristy of Athens Medical School, “ATTIKON” University Hospital, Athens, Greece;
2. Department of Medical Laboratories, University of Applied Sciences of Thessaly, Larissa, Greece;
3. General Paediatrics Department, Our Lady’s Children’s Hospital, Crumlin, Dublin, Ireland;
4. Department of Cytopathology, National and Kapodistrian University of Athens Medical School, “ATTIKON” University Hospital, Athens, Greece;
5. Department of Neonatology, Elena Venizelou Materinity Hospital, Athens, Greece;
6. Department of Neonatology, National and Kapodistrian University of Athens Medical School, Aretaieion Hospital, Athens, Greece;
7. Public Health Laboratories, Hellenic Pasteur institute, Athens, Greece;
8. Second Department of Pediatrics, National and Kapodistrian Univeristy of Athens Medical School, P&A Kyriakou Childrens’ Hospital, Athens, Greece