Verberckmoes S, de Bosschere H, van Soom A, Vervaet P, de Kruif A
Department of Reproduction, Obstetrics and Herd Health, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium.
Vet Rec. 2003 May 3;152(18):566-7. doi: 10.1136/vr.152.18.566.