Author Contributions: Dr Feldman 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: Yelverton, Pearce, and Feldman. Acquisition of data: Yelverton, Clark, and Fleischer. Analysis and interpretation of data: Yentzer, Balkrishnan, Camacho, Boles, Fleischer, and Feldman. Drafting of the manuscript: Yelverton, Yentzer, and Camacho. Critical revision of the manuscript for important intellectual content: Clark, Pearce, Balkrishnan, Camacho, Boles, Fleischer, and Feldman. Statistical analysis: Balkrishnan and Camacho. Obtained funding: Feldman. Administrative, technical, and material support: Yelverton, Yentzer, Clark, Pearce, Balkrishnan, Camacho, Boles, Fleischer, and Feldman. Study supervision: Fleischer and Feldman.