Authors
Łukasz Bocian
Department of Epidemiology and Risk Assessment, Puławy, Poland
Maciej Frant
Department of Swine Diseases, National Veterinary Research Institute, Puławy, Poland
Anna Ziętek-Barszcz
Department of Epidemiology and Risk Assessment, Puławy, Poland
Krzysztof Niemczuk
National Veterinary Research Institute, Puławy, Poland
Anna Szczotka-Bochniarz
Department of Swine Diseases, National Veterinary Research Institute, Puławy, Poland