Monitoring porcine reproductive and respiratory syndrome virus infection status in swine herds based on analysis of antibodies in meat juice samplesSten Mortensen, Bertel Strandbygaard, Anette Bøtner, Niels Feld and Preben WillebergVet. Res., 32 5 (2001) 441-453DOI: https://doi.org/10.1051/vetres:2001136