1. Department of Animal Physiology, Slovak University of Agriculture in Nitra, Nitra, Slovak Republic;
2. National Agricultural and Food Centre, Research Institute for Animal Production Nitra, Luzianky, Slovak Republic;
3. Institute of Biology, Pedagogical University of Cracow, Kraków, Poland;
4. Department of Agro-Food Technology, Universidad Miguel Hernández de Elche, Orihuela, Spain