[1] Univ Environm & Life Sci Wroclaw, Fac Vet Med, Dept Anim Physiol & Biostruct, Kozuchowska 1-3, PL-51631 Wroclaw, Poland
[2] Warsaw Univ Life Sci, Fac Vet Med, Dept Morphol Sci, Nowoursynowska 159, PL-02776 Warsaw, Poland
[3] Wroclaw Univ Environm & Life Sci, Dept Pathol, CK Norwida 25-27, PL-50375 Wroclaw, Poland
[4] Wroclaw Zool Garden, Wroblewskiego 1-5, PL-51618 Wroclaw, Poland
[5] Tiergarten Nuernberg, Tiergarten 30, D-90480 Nurnberg, Germany