1. Department of Physiotherapy, Poznan University of Physical Education, Faculty of Sport Sciences in Gorzow Wlkp., 61-871 Poznan, Poland
2. Department of Perinatology and Gynecology, Division of Gynecology, Poznan University of Medical Sciences, 61-758 Poznan, Poland
3. Faculty of Health, Catholic University, 034 01 Ružomberok, Slovakia
4. College of Polytechnics, 586 01 Jihlava, Czech Republic
5. SNP Central Military Hospital, Faculty Hospital, 034 01 Ružomberok, Slovakia
6. Department of Mathematical and Statistical Methods, Poznan University of Life Sciences, 60-637 Poznan, Poland