1. Department of Physiology Institute of Biology and Earth Science Pomeranian University in Slupsk Słupsk Poland
2. Department of Animal Physiology Institute of Biology and Ecology Faculty of Science P.J. Šafárik University in Košice Košice Slovakia
3. Department of Pathology St. Elizabeth Cancer Institute Hospital Bratislava Slovakia
4. Biomedical Research Center Slovak Academy of Sciences Bratislava Slovakia