Thomsen P T, Gidekull M, Herskin M S, Huxley J N, Pedersen A R, Ranheim B, Whay H R
Department of Animal Health and Bioscience, Faculty of Agricultural Sciences, University of Aarhus, PO Box 50, 8830 Tjele, Denmark.
Vet Rec. 2010 Aug 14;167(7):256-8. doi: 10.1136/vr.c3851.