1. a Avian Diseases Division of Clinical Sciences Department, Faculty of Veterinary Medicine , Warsaw University of Life Sciences , 8, Ciszewskiego St., 02-787 , Warsaw , Poland
2. b National Tuberculosis Reference Laboratory , National Tuberculosis and Lung Diseases Research Institute , 26, Plocka St., 01-138 , Warsaw , Poland
3. c Pathology Division of Clinical Sciences Department, Faculty of Veterinary Medicine , Warsaw Agricultural University , 166, Nowoursynowska St., 02-787 , Warsaw , Poland
4. d Department of Biometry, Faculty of Agriculture and Biology , The Warsaw University of Life Sciences , 166, Nowoursynowska St., 02-787 , Warsaw , Poland