Author Contributions: Dr De Wals 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: De Wals, Deceuninck,
Acquisition of data: Deceuninck, Boulianne.
Analysis and interpretation of data: De Wals,
Deceuninck, Boulianne, De Serres.
Drafting of the manuscript: De Wals, Deceuninck.
Critical revision of the manuscript for important
intellectual content: De Wals, Deceuninck, Boulianne, De Serres.
Statistical analysis: De Wals, Deceuninck,
Obtained funding: De Wals, Boulianne.
Administrative, technical, or material support:
Study supervision: De Wals, Boulianne, De Serres.
Funding/Support: The study was supported by
the Quebec Ministry of Health and Social Services.
Role of the Sponsor: The Quebec Ministry of
Health and Social Services had no role in the design and conduct of the study;
in the collection, management, analysis, and interpretation of the data; or
in the preparation, review, and approval of the article.
Previous Presentation: The results of this
study have been presented in a poster session at the 12th Interscience Congress
on Infectious Diseases, held March 4 through 7, 2004, Cancun, Mexico.
Acknowledgment: Manon Lorange and Louise Ringuette
from the Quebec Public Health Laboratory, Diane Audet, and Manale Ouakki from
the Quebec Hospital Research Center, and Sylfreed Minzunza from the Quebec
Ministry of Health and Social Services provided valuable assistance for the