Pusterla N, Norris A J, Stacy B A, Smith P, Fielding C L, Moore P F, Watson J L
Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California, Davis 95616, USA.
Vet Rec. 2003 Oct 25;153(17):530-2. doi: 10.1136/vr.153.17.530.