Authors
Grzegorz Woźniakowski
grzegorz.wozniakowski@piwet.pulawy.pl
Department of Poultry Viral Diseases, National Veterinary Research Institute, Pulawy, Poland
Elżbieta Samorek-Salamonowicz
Department of Poultry Viral Diseases, National Veterinary Research Institute, Pulawy, Poland