Serological and virological BVDV prevalence and risk factor analysis for herds to be BVDV seropositive in Belgian cattle herds., Sarrazin, Steven, Veldhuis Anouk, Méroc Estelle, Vangeel Ilse, Laureyns Jozef, Dewulf Jeroen, Cay Ann Brigitte, Piepers Sofie, Hooyberghs Jozef, Ribbens Stefaan, et al. , Prev Vet Med, 2013 Jan 01, Volume 108, Issue 1, p.28-37, (2013)