1. Department of Hematology and Blood Transfusion Unit, Aretaieion Hospital, School of Medicine, University of Athens, Athens, Greece;
2. Haematology Research Laboratory, Biomedical Research Foundation, Academy of Athens, Athens, Greece;
3. Department of Haematology and Bone Marrow Transplantation, Laikon Hospital, School of Medicine, University of Athens, Athens, Greece
4. Second Department of Pathology, University General Hospital “ATTIKON”, School of Medicine, University of Athens, Athens, Greece;
5. Laboratory of Microbiology, Aretaieion General Hospital, School of Medicine, University of Athens, Athens, Greece;
6. Pathology and Physiology Department, Laikon Hospital, School of Medicine, University of Athens, Athens, Greece;
7. Hellenic Cord Blood Bank, Biomedical Research Foundation of the Academy of Athens, Athens, Greece;
8. Second Department of Obstetrics and Gynecology, National and Kapodistrian University of Athens, Athens, Greece;