1. 1st Internal Medicine Clinic, Laiko Hospital, National and Kapodistrian University of Athens, Athens, Greece
2. Hematology Laboratory-Blood Bank, Aretaieion Hospital, National and Kapodistrian University of Athens, Athens, Greece
3. 2nd Department of Obstetrics and Gynecology, Aretaieion General Hospital, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece