Institution: | 1.Department of Disease Control and Epidemiology,SVA, National Veterinary Institute,Uppsala,Sweden;2.Swedish University of Agricultural Sciences,Department of Clinical Sciences,Uppsala,Sweden;3.Research Centre of Systems Biology, Ecological modelling,University of Sk?vde,Sk?vde,Sweden;4.IFM, Theory and Modelling, Link?pings Universitet,Link?ping,Sweden |