Torsten Mörner (Department of Disease Control and Epidemiology, National Veterinary Institute, Uppsala, Sweden), Jonas Malmsten (Department of Pathology and Wildlife Diseases, National Veterinary Institute, Uppsala, Sweden), Henrik Uhlhorn (Department of Pathology and Wildlife Diseases, National Veterinary Institute, Uppsala, Sweden), Erik Agren (Department of Pathology and Wildlife Diseases, National Veterinary Institute, Uppsala, Sweden), Gete Hestvik (Department of Pathology and Wildlife Diseases, National Veterinary Institute, Uppsala, Sweden), Caroline Bröjer (Department of Pathology and Wildlife Diseases, National Veterinary Institute, Uppsala, Sweden)