1. AgroBioTech Research Centre, Slovak University of Agriculture in Nitra, Nitra, Slovak Republic
2. Institute of Applied Biology, Slovak University of Agriculture in Nitra, Nitra, Slovak Republic
3. Institute of Animal Husbandry, Slovak University of Agriculture in Nitra, Nitra, Slovak Republic
4. Department of Animal Physiology, Pedagogical University of Kraków, Kraków, Poland