1. Enterovirus Laboratory, Institute of Microbiology, Faculty of Medicine, Slovak Medical University, Bratislava, Slovak Republic
2. School of Veterinary Medicine and Biomedical Sciences, University of Nebraska-Lincoln, Lincoln, NE, USA
3. Martinske biopticke centrum s.r.o, Zilina, Slovak Republic
4. Immunohistochemical Laboratory, Medical Laboratory Pathology and Cytology, Cytopathos, s.r.o, Bratislava, Slovak Republic