1. Third Department of Obstetrics and Gynecology, University General Hospital “ATTIKON”, Medical School, National and Kapodistrian University of Athens, 124 62 Athens, Greece
2. First Department of Obstetrics and Gynecology, Alexandra Hospital, Medical School, National and Kapodistrian University of Athens, 115 28 Athens, Greece
3. London Women’s Clinic, Marylebone, London WIG 6AP, UK
4. Medical School, National and Kapodistrian University of Athens, 115 27 Athens, Greece
5. Department of Obstetrics and Gynecology, University of Patras, 265 04 Patras, Greece