Author Contributions: Drs Kaplan and Callen 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: Brey, Purkiss, and Callen. Acquisition of data: Brey, Purkiss, and Sehgal. Analysis and interpretation of data: Purkiss and Kaplan. Drafting of the manuscript: Brey and Purkiss. Critical revision of the manuscript for important intellectual content: Purkiss, Sehgal, Kaplan, and Callen. Statistical analysis: Purkiss. Obtained funding: Kaplan. Administrative, technical, and material support: Pur kiss and Kaplan. Study supervision: Kaplan and Callen.