1. Clinic and Department of Obstetrics, Women’s Diseases and Oncological Gynecology , Collegium Medicum in Bydgoszcz , Nicolaus Copernicus University , University Hospital No.2 Jana Biziela in Bydgoszcz , Bydgoszcz , Poland
2. Poznań University of Physical Education , Faculty of Sport Sciences in Gorzow Wlkp., Department of Physiotherapy , Poznań, Poland
3. Department of Mathematical and Statistical Methods, Poznan University of Life Science, Poznań, Poland