Accepted for Publication: June 13, 2010.
Author Contributions: Study concept and design: Stauffer, Bray, and Bowers. Acquisition of data: Stauffer, Bray, Nakhleh, and Bowers. Analysis and interpretation of data: Stauffer, Bray, Nakhleh, and Bowers. Drafting of the manuscript: Stauffer and Bowers. Critical revision of the manuscript for important intellectual content: Stauffer, Bray, and Bowers. Administrative, technical, and material support: Bray. Study supervision: Bowers.
Financial Disclosure: None reported.