1. Department of Pathology, IEMPAM, Bulgarian Academy of Sciences, ‘’Acad. G. Bonchev’’ Str. 25, 1113, Sofia, Bulgaria
2. Institute of Experimental Morphology, Pathology and Anthropology with Museum (IEMPAM), Bulgarian Academy of Sciences, “Acad. G. Bonchev” Str. 25, 1113Sofia, Bulgaria
3. Department of Pathology, Faculty of Medicine, Comenius University in Bratislava, Sasinkova 4, 81372Bratislava, Slovakia
4. Department of Molecular Biomedicine, Faculty of Medicine, Comenius University in Bratislava, Sasinkova 4, 81372Bratislava, Slovakia
5. Institute of Parasitology, Slovak Academy of Sciences, Hlinkova 3, 040 01Košice, Slovak Republic