1. Department of Obstetrics and Gynecology , University Hospital and Masaryk University , Brno , Czech Republic
2. Department of Veterinary Sciences , Czech University of Life Sciences in Prague , Prague , Czech Republic
3. Institute of Biology and Immunology of Reproduction , Bulgarian Academy of Sciences , Sofia , Bulgaria
4. Gyn-Fiv, Centre for Gynaecology and Assisted Reproduction , Bratislava , Slovak Republic
5. Department of Health Sciences, Faculty of Medicine , Masaryk University , Brno , Czech Republic