Ortiz, J. R., Sotomayor, V., Uez, O. C., Oliva, O., Bettels, D., McCarron, M., . . . Mounts, A. W. (2009). Strategy to Enhance Influenza Surveillance Worldwide. Centers for Disease Control and Prevention.

Ortiz, Justin R., Viviana Sotomayor, Osvaldo C. Uez, Otavio Oliva, Deborah Bettels, Margaret McCarron, Joseph S. Bresee, and Anthony W. Mounts. Strategy to Enhance Influenza Surveillance Worldwide. Centers for Disease Control and Prevention, 2009.

Ortiz, Justin R., et al. Strategy to Enhance Influenza Surveillance Worldwide. Centers for Disease Control and Prevention, 2009.