1. Central Veterinary Institute, Budapest, Hungary.
2. Department of Virology, “Béla Johan” National Center for Epidemiology, Budapest, Hungary.
3. Department of Microbiology and Infectious Diseases, Faculty of Veterinary Science, Szent István University, Budapest, Hungary.
4. Zoonoses and Emerging Infections Group, Clinical Virology, Clinical Department of Diagnostic Imaging, Infectious Diseases and Clinical Pathology, University of Veterinary Medicine, Vienna, Austria.