1. Department of Food Hygiene and Environmental Health; Faculty of Veterinary Medicine; University of Helsinki; Helsinki Finland
2. Department of Veterinary Biosciences; Faculty of Veterinary Medicine; University of Helsinki; Helsinki Finland
3. Department of Virology; Haartman Institute; University of Helsinki; Helsinki Finland
4. Department of Basic Veterinary Sciences and Population Medicine; Institute of Veterinary Medicine and Animal Sciences; Estonian University of Life Sciences; Tartu Estonia
5. Department of Virology and Immunology; HUSLAB; Helsinki University Central Hospital; Helsinki Finland