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Publisher's Note: Correction to Acknowledgments

Posted by PLOS_ONE_Group on 01 Jul 2008 at 19:30 GMT

The viruses used for the HI assay are reassortant strains obtained from Dr. Rubin Donis (CDC, Atlanta, GA).
http://plosone.org/article/info:doi/10.1371/journal.pone.0002517#article1.back1.ack1.p1

The authors would also like to acknowledge Hanne Anderson (Bioqual, Inc) for her help in this study.