Macroepidemiological aspects of porcine reproductive and respiratory syndrome virus detection by major United States veterinary diagnostic laboratories over time, age group, and specimen. - Trevisan, Giovani; Linhares, Leticia C. M.; Crim, Bret; Dubey, Poonam; Schwartz, Kent J.; Burrough, Eric R.; Main, Rodger G.; Sundberg, Paul; Thurn, Mary; Lages, Paulo T. F.; Corzo, Cesar A.; Torrison, Jerry; et al. (PLoS ONE, 2019)