1 First Department of Obstetrics and Gynaecology, National and Kapodistrian University of Athens, "Alexandra" General Hospital, Athens, Greece.
2 Second Department of Pediatrics, National and Kapodistrian University of Athens, Panagiotis and Aglaia Kyriakou Hospital, Athens, Greece.
3 First Department of Obstetrics and Gynaecology, National and Kapodistrian University of Athens, "Alexandra" General Hospital, Athens, Greece. Electronic address: [email protected].