Published Online: November 19, 2012. doi:10.1001/2013.jamainternmed.480
Author Contributions: Dr Nerurkar 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: Nerurkar, Bitton, Phillips, and Yeh. Acquisition of data: Nerurkar. Analysis and interpretation of data: Nerurkar, Bitton, Davis, and Yeh. Drafting of the manuscript: Nerurkar. Critical revision of the manuscript for important intellectual content: Nerurkar, Bitton, Davis, Phillips, and Yeh. Statistical analysis: Nerurkar and Davis. Obtained funding: Phillips. Administrative, technical, and material support: Nerurkar. Study supervision: Phillips and Yeh.
Conflict of Interest Disclosures: None reported.
Funding/Support: Dr Nerurkar is supported by an Institutional National Research Service Award (T32AT000051-11) from the National Institutes of Health (NIH). Dr Davis is supported in part by the Harvard Catalyst and the Harvard Clinical and Translational Science Center (NIH award UL1RR025758).
Disclaimer: The analyses, interpretations, and conclusions within this article are those of the authors and do not reflect the views of the National Center for Health Statistics nor the Centers for Disease Control.
Additional Contributions: Susan M. Schappert, MA, health statistician at the National Center for Health Statistics of the Centers of Disease Control, provided technical and statistical assistance.