1. Department of Obstetrics and Gynaecology, Democritus University of Thrace, Alexandroupolis, Greece;
2. Department of Medical Statistics, Medical Faculty, Democritus University of Thrace, Alexandroupolis, Greece;
3. Department of Social Administration, Democritus University of Thrace, Alexandroupolis, Greece;
4. Department of Radiology and Medical Imaging, Democritus University of Thrace, Alexandroupolis, Greece