1. Department of Virology, National Veterinary Research Institute (NVRI), Partyzantów 57, 24-100 Puławy, Poland
2. Veterinary Clinic, ul. Kilińskiego 3A, 43-200 Pszczyna, Poland
3. Department of Biochemistry, National Veterinary Research Institute (NVRI), Partyzantów 57, 24-100 Puławy, Poland
4. Department of Animal Genetic and Conservation, Institute of Animal Sciences, Warsaw University of Life Sciences SGGW, Ciszewskiego 8, 02-786 Warszawa, Poland
5. Białowieża National Park, Park Pałacowy 11, 17-230 Białowieża, Poland
6. Institute of Forest Sciences, Faculty of Civil Engineering and Environmental Sciences, Białystok University of Technology, Wiejska 45 E, 15-351 Białystok, Poland