1. Department of Animal Physiology, Faculty of Veterinary Medicine , University of Life Sciences in Lublin , Akademicka 12, 20-950 Lublin , Poland
2. Department of Functional Anatomy and Cytobiology , Maria Curie-Sklodowska University , Akademicka 19, 20-033 Lublin , Poland
3. School of Physiology , Faculty of Health Sciences , University of the Witwatersrand , 7 York Road, Parktown, Johannesburg, 2193 , South Africa
4. Department of Biophysics, Faculty of Environmental Biology , University of Life Sciences in Lublin, Akademicka 13 , 20-950 Lublin , Poland