1. School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
2. Reproductive Endocrinology Unit, 3rd Department of Obstetrics and Gynecology, University General Hospital “Attikon”, Medical School, National and Kapodistrian University of Athens Greece, Athens, Greece
3. Department of Endocrinology and Metabolic Disorders, University Hospital of Larissa, Medical School of Larissa, University of Thessaly, Larissa, Greece
4. 2nd Department of Obstetrics and Gynecology, University Hospital “Aretaieion”, Medical School, National and Kapodistrian University of Athens Greece, Athens, Greece