Accepted for Publication: February 15, 2012.
Author Contributions: All authors had full access to all of 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: Alghothani, Jacks, Vander Horst, and Zirwas. Acquisition of data: Alghothani and Jacks. Analysis and interpretation of data: Alghothani, Jacks, Vander Horst, and Zirwas. Drafting of the manuscript: Alghothani, and Vander Horst. Critical revision of the manuscript for important intellectual content: Jacks, Vander Horst, and Zirwas. Statistical analysis: Vander Horst. Administrative, technical, and material support: Jacks. Study supervision: Zirwas.
Financial Disclosure: None reported.