1. Natural Resources Institute Finland, Itäinen Pitkäkatu 3 A, FI-20520 Turku, Finland
2. Swedish museum of natural history, Environmental research and monitoring, P.O. Box 50007, SE-104 05 Stockholm, Sweden
3. Finnish Food Safety Authority Evira, Production Animal and Wildlife Health Research Unit, Elektroniikkatie 3, FI-90590 Oulu, Finland