Christiansen J G, Astrup L B, Aalbæk B, Leifsson P S, Jensen H E, Toft N
Department of Veterinary Disease Biology, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg, Denmark.
Vet Rec. 2013 Feb 2;172(5):130. doi: 10.1136/vr.101207. Epub 2013 Jan 3.