1. 2nd Department of Obstetrics and Gynecology, National and Kapodistrian University of Athens, GR-11528 Athens, Greece
2. 3rd Department of Obstetrics and Gynecology, National and Kapodistrian University of Athens, GR-11528 Athens, Greece
3. Hormonal Laboratory, Aretaieio Hospital, National and Kapodistrian University of Athens, GR-11528 Athens, Greece