1. Department of Biology and Wildlife Diseases, Faculty of Veterinary Hygiene and Ecology University of Veterinary Sciences Brno Brno Czech Republic
2. Department of Veterinary Sciences, Faculty of Agrobiology, Food and Natural Resources Czech University of Life Sciences Prague Prague 6 Czech Republic
3. Department of Biology University of Trnava Trnava Slovakia
4. Institute of Vertebrate Biology Czech Academy of Sciences Brno Czech Republic