1. Division of Infectious Diseases and Epidemiology; Department of Large Animal Diseases with the Clinic; Faculty of Veterinary Medicine; Warsaw University of Life Sciences; Nowoursynowska 159c 02-776 Warsaw Poland
2. Animal Health and Veterinary Laboratories Agency - Weybridge; Woodham Lane, New Haw Addlestone Surrey KT15 3NB UK
3. Division of Infectious Diseases; Department of Small Animal Diseases with the Clinic; Faculty of Veterinary Medicine; Warsaw University of Life Sciences; Nowoursynowska 159c 02-776 Warsaw Poland