Laureyns J, Letellier C, Meganck V, Pardon B, Deprez P, de Kruif A
Department of Reproduction, Obstetrics, and Herd Health, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium.
Vet Rec. 2011 Jul 23;169(4):100. doi: 10.1136/vr.d2611. Epub 2011 Jun 27.