1. Department of Biotechnics, St. Istvan University, Pater K. u. 1, 2100 Gödöllő, Hungary
2. Department of Veterinary Clinical Medicine, Faculty of Veterinary Science, Tottori University, 4-101 Minami, Koyama-Cho, Tottori, Japan
3. 1st Department of Pathology and Experimental Cancer Research, Semmelweis University, Ulloi UCt 26, 1085 Budapest, Hungary