Accepted for Publication: June 14, 2012.
Author Contributions: Dr Cukras 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. Study concept and design: Cukras and Stern. Acquisition of data: Cukras. Analysis and interpretation of data: Cukras and Stern. Drafting of the manuscript: Cukras. Critical revision of the manuscript for important intellectual content: Stern. Statistical analysis: Stern. Administrative, technical, and material support: Stern. Study supervision: Stern.
Conflict of Interest Disclosures: None reported.