1. Department of Gynecology, Athens Euroclinic Hospital, Athens, Greece;
2. Department of Gynecology and Obstetrics, University Hospital of Mainz University of Mainz Medical School, Mainz, Germany;
3. Third Department of Obstetrics and Gynecology, General University Hospital “Attikon”, University of Athens, Athens, Greece;
4. Department of Hygiene, Epidemiology and Medical Statistics, School of Medicine, National University of Athens, Athens, Greece;
5. Section of Medical Oncology, Second Department of Internal Medicine, General University Hospital “Attikon”, University of Athens, Athens, Greece