1. Department of Hematology, National & Kapodistrian University of Athens, General Hospital of Athens LAIKO, Athens, Greece
2. Hematology Laboratory, National and Kapodistrian University of Athens, Athens, Greece
3. Blood Transfusion Service & National Reference Center for Congenital Bleeding Disorders, General Hospital of Athens LAIKO, Athens, Greece
4. Hematology Laboratory-Blood Bank, Aretaieio Hospital, School of Medicine,National & Kapodistrian University of Athens, Athens, Greece