Konold T, Spiropoulos J, Chaplin M J, Stack M J, Hawkins S A C, Wilesmith J W, Wells G A H
Animal Sciences Unit, Animal Health and Veterinary Laboratories Agency Weybridge, New Haw, Addlestone, Surrey KT15 3NB, UK.
Vet Rec. 2013 Aug 3;173(5):118. doi: 10.1136/vr.101286. Epub 2013 May 30.