1. Department of Obstetrics and Gynecology; Ludwik Rydygier Collegium Medicum in Bydgoszcz; Nicolaus Copernicus University; Bydgoszcz Poland
2. Gynecology and Oncology Department of the Lukaszczyk Oncological Center in Bydgoszcz and Chair of Gynecology; Oncology and Gynecological Nursing of the Ludwik Rydygier Collegium Medicum in Bydgoszcz; Nicolaus Copernicus University; Bydgoszcz Poland
3. Department of Pathomorphology; Jagiellonian University; Krakow Poland
4. Department of Gynecology and Obstetrics; Faculty of Medicine; University Duisburg-Essen; Essen Germany
5. Department of Obstetrics and Gynecology; Rzeszow University; Rzeszow Poland
6. Department of Oncological Laryngology Ludwik Rydygier Collegium Medicum in Bydgoszcz; Nicolaus Copernicus University; Bydgoszcz Poland
7. Department of Obstetrics and Gynecology; Silesian Medical University; Katowice Poland