Penrose L C, Brower A, Kirk G, Bowen I M, Hallowell G D
School of Veterinary Medicine and Science, University of Nottingham, Sutton Bonington Campus, Sutton Bonington, Leics LE12 5RD, UK.
Vet Rec. 2012 Jul 7;171(1):20. doi: 10.1136/vr.100644. Epub 2012 Jun 7.