1. Department of Virology, The National Veterinary Research Institute, 57 Partyzantów Avenue, 24-100, Puławy, Poland
2. Białowieża National Park, Park Pałacowy 11, 17-230 Białowieża, Poland
3. Department of Zoology, Maria Curie-Skłodowska University, Plac Marii Curie-Skłodowskiej 5, 20-031 Lublin, Poland
4. Department of Veterinary and Biomedical Sciences, South Dakota State University, 1015 Campanile Avenue, Brookings, South Dakota 57007-1396, USA