If you use data provided by the US-SPD, please credit in the following format: 

Anderson, T.K., Inderski, B., Diel, D.G., Hause, B.M., Porter, E., Clement, T., Nelson, E.A., Bai, J., Christopher-Hennings, J., Gauger, P.C., Zhang, J., Harmon, K.M., Main, R., Lager, K.M., Faaberg, K.S. The United States Swine Pathogen Database: integrating veterinary diagnostic laboratory sequence data to monitor emerging pathogens of swine. bioRxiv preprint 2021.04.16.439882. (date data retrieved).