Accepted for Publication: April 17, 2013.
Published Online: November 25, 2013. doi:10.1001/jamapediatrics.2013.2752.
Study concept and design: Holman, Benard, Roland, Watson, Stokley.
Acquisition of data: Holman.
Analysis and interpretation of data: All authors.
Drafting of the manuscript: All authors.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Watson, Holman.
Administrative, technical, or material support: Holman, Roland, Watson.
Conflict of Interest of Disclosures: None reported.
Disclaimer: The findings and conclusions in this report are those of the authors and do not necessarily represent the official position of the Centers for Disease Control and Prevention.