Cassar C A, Ottaway M, Paiba G A, Futter R, Newbould S, Woodward M J
Department of Bacterial Diseases, Veterinary Laboratories Agency - Weybridge, Woodham Lane, New Haw, Addlestone, Surrey KT15 3NB.
Vet Rec. 2004 Feb 21;154(8):237-9. doi: 10.1136/vr.154.8.237.