Accepted for Publication: November 4, 2011.
Author Contributions:Study concept and design: Pappou, Velopulos, and Haut. Acquisition of data: Pappou and Fishman. Analysis and interpretation of data: Pappou and Fishman. Drafting of the manuscript: Pappou. Critical revision of the manuscript for important intellectual content: Velopulos, Fishman, and Haut. Administrative, technical, and material support: Fishman. Study supervision: Velopulos, Fishman, and Haut.
Conflict of Interest Disclosures: None reported.