1. Department of Veterinary Biosciences, Faculty of Veterinary Medicine, University of Helsinki, Helsinki, Finland
2. Department of Virology, Faculty of Medicine, University of Helsinki, Helsinki, Finland
3. Department of Equine and Small Animal Medicine, Faculty of Veterinary Medicine, University of Helsinki, Helsinki, Finland
4. Finnish Food Authority, Seinäjoki, Finland
5. Institute of Biotechnology, University of Helsinki, Helsinki, Finland
6. HUSLAB, Hospital District of Helsinki and Uusimaa, Helsinki, Finland