Geurden T, Verelst A, Somers R, Dierickx N, Vercruysse J
Department of Virology, Parasitology and Immunology, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium.
Vet Rec. 2003 Aug 30;153(9):272-3. doi: 10.1136/vr.153.9.272.