1. Lunney, J. K., Benfield, D. A. & Rowland, R. R. R. Porcine reproductive and respiratory syndrome virus: An update on an emerging and re-emerging viral disease of swine. Virus Res. 154, 1–6 (2010).
2. Holtkamp, D. J. et al. Assessment of the economic impact of porcine reproductive and respiratory syndrome virus on United States pork producers. J. Swine Heal. Prod. 21, 72–84 (2013).
3. Rossow, K. D. Porcine Reproductive and Respiratory Syndrome. Vet. Pathol. 35, 1–20 (1998).
4. Keffaber, K. K. Reproductive failure of unknown etiology. Assoc. Swine Pract. Newsl. 1, 1–9 (1989).
5. Lindhaus, W. & Lindhaus, B. Mystery Swine Disease. Prakt. Tierartz 72, 423–425 (1991).