Authors
Andrzej Kowalczyk
andrzej.kowalczyk@piwet.pulawy.pl
Department of Swine Diseases, National Veterinary Research Institute, Pulawy, Poland
Edyta Kozak
Department of Swine Diseases, National Veterinary Research Institute, Pulawy, Poland
Magdalena Łyjak
Department of Swine Diseases, National Veterinary Research Institute, Pulawy, Poland
Zygmunt Pejsak
Department of Swine Diseases, National Veterinary Research Institute, Pulawy, Poland
Krzysztof Niemczuk
Department of Swine Diseases, National Veterinary Research Institute, Pulawy, Poland