Published Online: February 2, 2006 (doi:10.1001/jama.295.8.joc60020).
Author Contributions: Dr Bright had full access
to all of the data in the study and takes responsibility for the integrity
of the data and the accuracy of the data analysis.
Study concept and design: Bright, Shay, Cox.
Acquisition of data: Bright, Shu.
Analysis and interpretation of data: Bright,
Shay, Shu, Cox, Klimov.
Drafting of the manuscript: Bright, Shay.
Critical revision of the manuscript for important
intellectual content: Bright, Shay, Shu, Cox, Klimov.
Statistical analysis: Shay.
Administrative, technical, or material support:
Shay, Cox, Klimov.
Study supervision: Bright, Cox, Klimov.
Financial Disclosures: None reported.
Disclaimer: The findings and conclusions in
this report are those of the authors and do not necessarily represent the
views of the Centers for Disease Control and Prevention.
Acknowledgment: We thank the National Influenza
Centers, state public health laboratories, and participating laboratories
in the WHO global surveillance program for their submission of isolates. We
also acknowledge Jenna Achenbach, MS, Amanda Balish, BS, Angela Foust, MA,
Rebecca Garten, PhD, Henrietta Hall, BS, Jan Mabry, BSFR, Gilda Perez-Oronoz,
MSPH, and Teresa Wallis, MS, from the CDC Influenza Branch for their contributions
to this project.