Authors
Monika Olech
Department of Pathology, National Veterinary Research Institute, Puławy, Poland
Department of Swine Diseases, National Veterinary Research Institute, Puławy, Poland
Marta Antas
Department of Swine Diseases, National Veterinary Research Institute, Puławy, Poland
Anna Szczotka-Bochniarz
Department of Swine Diseases, National Veterinary Research Institute, Puławy, Poland