1. Department of Mother’s and Child’s Health, Poznań, Poland
2. Department of Rehabilitation, School of Health Science in Katowice, Medical University of Silesia, Katowice, Poland
3. Faculty of Medical Sciences in Zabrze, Medical University of Silesia, Katowice, Poland
4. Department of Gynecology and Obstetrics, Evangelical Hospital Hagen-Haspe, Hagen, Germany