Langhorn R, Willesen J L, Tarnow I, Kjelgaard-Hansen M, Koch J
Department of Veterinary Clinical and Animal Sciences, University of Copenhagen, Dyrlaegevej 16, Frederiksberg C DK-1870, Denmark.
Vet Rec. 2016 May 21;178(21):532. doi: 10.1136/vr.103549. Epub 2016 Apr 13.