1 First Department of Obstetrics and Gynaecology, Centre of Postgraduate Medical Education, Warsaw, Poland.
2 Department of Obstetrics, Women's Diseases and Oncological Gynaecology, Central Clinical Hospital of the Ministry of Interior and Administration, Warsaw, Poland.
3 Third Chair and Department of Gynaecology, Medical University of Lublin, Lublin, Poland.
4 Department of Infertility and Reproductive Endocrinology, Gynaecology and Obstetrics Clinical Hospital of the Medical University, Poznań, Poland.
5 Chair of Women's Health, Medical University of Silesia, Katowice, Poland.