Author Contributions: Drs Campbell and Englesbe 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: Campbell, Englesbe, Phillips, Velanovich, Lloyd, Hutton, and Share. Acquisition of data: Campbell, Englesbe, Kubus, Hutton, and Arneson. Analysis and interpretation of data: Campbell, Englesbe, Kubus, and Shanley. Drafting of the manuscript: Campbell, Englesbe, Kubus, Phillips, and Lloyd. Critical revision of the manuscript for important intellectual content: Campbell, Englesbe, Shanley, Velanovich, Hutton, Arneson, and Share. Statistical analysis: Englesbe and Kubus. Obtained funding: Campbell and Share. Administrative, technical, and material support: Campbell, Englesbe, Phillips, and Velanovich. Study supervision: Campbell, Shanley, Hutton, and Arneson.