Characterizing best practices for tonsil-oral-scrubbing (TOSc) collection for PRRSV RNA detection in sows oleh Peng Li, Ana Paula Poeta Silva, Hao Tong, Paul Yeske, Laura Dalquist, Jason Kelly, Matt Finch, Amanda V. Anderson Reever, Darwin L. Reicks, Joseph F. Connor, Phillip C. Gauger, Derald J. Holtkamp, Gustavo S. Silva, Giovani Trevisan, Daniel C. L. Linhares