Authors
Wojciech Kozdruń
Department of Poultry Viral Diseases, National Veterinary Research Institute, Pulawy, Poland
Hanna Czekaj
Department of Poultry Viral Diseases, National Veterinary Research Institute, Pulawy, Poland
Natalia Styś
Department of Poultry Viral Diseases, National Veterinary Research Institute, Pulawy, Poland