1. National Veterinary Institute, Uppsala, Sweden
2. Yakutian Research Institute of Agriculture, Yakutsk, Russia
3. Natural Resources Institute Finland (Luke), Jokioinen, Finland
4. Section for Pathology, The Norwegian Veterinary Institute, Tromsø, Norway
5. Department of Arctic and Marine Biology, Arctic Infection Biology, UiT- The Arctic University of Norway, Tromsø, Norway
6. East Iceland Nature Research Centre, Egilsstaðir, Iceland
7. Farm and Animal Health, Uppsala, Sweden
8. Department of Clinical Sciences, Swedish University of Agricultural Sciences, Uppsala, Sweden
9. Department of Biomedical Sciences and Veterinary Public Health, Swedish University of Agricultural Sciences, Uppsala, Sweden