1. VEDIA, Private Veterinary Laboratory, 38601 Strakonice, Czech Republic
2. Dept. of Infectious Diseases and Veterinary Epidemiology, Faculty of Veterinary Medicine, University of Veterinary and Pharmaceutical Sciences, Palackého 1-3, 612 42 Brno, Czech Republic
3. DYNTEC, Pražská 328, 411 55 Terezin, Czech Republic