Author Contributions: Dr Abdullah had full access to all the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis including statistical analysis. Study concept and design: Chang, Arnold, and Abdullah. Acquisition of data: Zhang, Arnold, Gabre-Kidan, and Bathurst. Analysis and interpretation of data: Camp, Chang, Zhang, Arnold, Sharpe, Gabre-Kidan, and Abdullah. Drafting of the manuscript: Camp, Chang, Zhang, Sharpe, Bathurst, and Abdullah. Critical revision of the manuscript for important intellectual content: Camp, Chang, Arnold, Gabre-Kidan, and Abdullah. Statistical analysis: Chang, Zhang, and Arnold. Obtained funding: Abdullah. Administrative, technical, and material support: Sharpe, Bathurst, and Abdullah. Study supervision: Abdullah.