Accepted for Publication: August 17, 2012.
Author Contributions: Dr Chen had full access to all of 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: Veledar and Chen. Acquisition of data: McKee and DeLong. Analysis and interpretation of data: Sperduto, McKee, DeLong, and Veledar. Drafting of the manuscript: Sperduto, McKee, and DeLong. Critical revision of the manuscript for important intellectual content: Sperduto, McKee, DeLong, Veledar, and Chen. Statistical analysis: McKee, DeLong, and Veledar. Administrative, technical, and material support: Sperduto. Study supervision: Chen.
Conflict of Interest Disclosures: None reported.
Additional Contributions: We are indebted to Bridget Bradley, RN, and Zakiya Rice, MD, for their assistance in and critical review of this work.