1. Department of Poultry Diseases, National Veterinary Research Institute, 24-100 Puławy, Poland
2. Foundation of Research and Science Development, 01-242 Warsaw, Poland
3. Department of Plant Physiology, Genetics and Biotechnology, Faculty of Biology and Biotechnology, University of Warmia and Mazury in Olsztyn, 10-719 Olsztyn, Poland
4. Department of Clinical Pathomorphology, The Medical University of Lublin, 20-090 Lublin, Poland