[1] St Istvan Univ, Dept Biotech, Godollo, Hungary
[2] Semmelweis Univ, Dept Pathol & Expt Canc Res 1, H-1085 Budapest, Hungary
[3] Tottori Univ, Fac Vet Sci, Dept Vet Clin Med, Tottori 680, Japan
[4] St Istvan Univ, Fac Vet Sci, Dept Pharmacol & Toxicol, Budapest, Hungary