a Department of Fish, Poultry and Fur Animals, National Veterinary Institute, Technical University of Denmark, Hangøvej 8, 8200 Århus N, Denmark b Department of Large Animal Sciences, Faculty of Life Sciences, University of Copenhagen, Grønnegårdsvej 8, 1870 Frederiksberg C, Denmark c Finnish Food Safety Authority Evira, Veterinary Virology Research Unit, Mustialankatu 3, FI-00790 Helsinki, Fin...
