Author Contributions:Study concept and design: Alam, Djohan, Bernard, and Siemionow. Acquisition of data: Alam, Djohan, Lohman, Gordon, and Hendrickson. Analysis and interpretation of data: Alam, Papay, and Gordon. Drafting of the manuscript: Alam, Djohan, and Gordon. Critical revision of the manuscript for important intellectual content: Alam, Papay, Bernard, Lohman, Gordon, Hendrickson, and Siemionow. Statistical analysis: Alam. Administrative, technical, and material support: Alam, Papay, and Gordon. Study supervision: Alam and Siemionow.