Submitted for Publication: August 8, 2011; accepted October 27, 2011.
Published Online: January 16, 2012. doi:10.1001/archoto.2011.1204
Author Contributions: All authors had full access to all the data in the study and take responsibility for the integrity of the data and the accuracy of the data analysis. Study concept and design: Chang, Florea, and Rowe. Acquisition of data: Chang, Florea, and Rowe. Analysis and interpretation of data: Chang, Florea, Rowe, and Seiberling. Drafting of the manuscript: Chang, Florea, Rowe, and Seiberling. Critical revision of the manuscript for important intellectual content: Florea and Seiberling. Statistical analysis: Florea. Obtained funding: Florea. Administrative, technical, and material support: Chang and Florea. Study supervision: Chang, Florea, Rowe, and Seiberling.
Financial Disclosure: None reported.