1. Virological Research Group, Szentágothai Research Center, University of Pécs, Pécs, Hungary.
2. Institute of Biology, Faculty of Sciences, University of Pécs, Pécs, Hungary.
3. Haartman institute and Dept of Veterinary Biosciences, University of Helsinki, Helsinki, Finland.
4. Finnish Forest Research Institute, Vantaa, Finland.
5. Hospital District of Helsinki and Uusimaa, Finland.
6. HUSLAB, HUS, Finland.
7. Veterinary Medical Research Institute, Hungarian Academy of Sciences, Budapest, Hungary.