Author Contributions: Dr Barefoot 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: Barefoot. Acquisition of data: Barefoot, Clapp-Channing, and Siegler. Analysis and interpretation of data: Barefoot, Brummett, Williams, Siegler, Helms, Boyle, and Mark. Drafting of the manuscript: Barefoot. Critical revision of the manuscript for important intellectual content: Barefoot, Brummett, Williams, Siegler, Helms, Boyle, Clapp-Channing, and Mark. Statistical analysis: Barefoot, Brummett, Helms, and Boyle. Obtained funding: Barefoot, Williams, and Mark. Administrative, technical, and material support: Siegler. Study supervision: Clapp-Channing and Mark.