Erratum

In “Altered Pathogenicity for Seasonal Influenza Virus by Single Reassortment of the RNP Genes Derived From the 2009 Pandemic Influenza Virus” by Hsieh et al. (J Infect Dis. (2011) 204 (6): 864–72), the authors who equally contributed to the study were incorrectly listed. The footnote on the first page of the article should instead read: “^a E.-F. H, S.-J. L, and C.-K. M. contributed equally to the study.” The publisher regrets this error.