1. Department of Production Animal Medicine; Faculty of Veterinary Medicine; University of Helsinki; Saarentaus Finland
2. Research and Laboratory Department; Food and Feed Microbiology Research Unit; Finnish Food Safety Authority Evira; Helsinki Finland
3. Department of Food Hygiene and Environmental Health; Faculty of Veterinary Medicine; University of Helsinki; Helsinki Finland
4. Veterinary Virology; Finnish Food Safety Authority Evira; Helsinki Finland