[1] ZOO Ljubljana, Ljubljana, Slovenia
[2] Univ Ljubljana, Vet Fac, Inst Pathol Wildlife Fish & Bees, Ljubljana, Slovenia
[3] Univ Vet & Pharmaceut Sci Brno, Fac Vet Hyg & Ecol, Dept Biol & Wildlife Dis, Palackeho Tr 1946-1, Brno 61242, Czech Republic
[4] Univ Med Ctr Ljubljana, Dept Orthoped Surg, Ljubljana, Slovenia