1. First Department of Obstetrics and Gynecology, Alexandra Hospital, Medical School, National and Kapodistrian University of Athens, 115 28 Athens, Greece
2. Third Department of Obstetrics and Gynecology, University General Hospital “ATTIKON”, Medical School, National and Kapodistrian University of Athens, 124 62 Athens, Greece
3. Pulmonary Department, General Clinic Euromedica, 544 54 Thessaloniki, Greece
4. Medical School, National and Kapodistrian University of Athens, 115 27 Athens, Greece