1. “Helena Venizelou” Maternity Hospital; Athens Greece
2. Immunology and Histocompatibility; “Helena Venizelou” Maternity Hospital; Athens Greece
3. Second Department of Obstetrics and Gynecology; Aretaieion Hospital; University of Athens Medical School; Athens Greece
4. Second Department of Obstetrics; Aretaieion Hospital; University of Athens Medical School; Athens Greece