Correspondence: Timothy M. Pawlik, MD, MPH, MTS, Department of Surgery, School of Medicine, The Johns Hopkins University, Harvey Room 611, 600 N Wolfe St, Baltimore, MD 21287 (tpawlik1@jhmi.edu).
Accepted for Publication: August 18, 2011.
Author Contributions: Study concept and design: Chamberlain, Koniaris, and Pawlik. Acquisition of data: Pawlik. Analysis and interpretation of data: Koniaris, Wu, and Pawlik. Drafting of the manuscript: Chamberlain, Koniaris, and Pawlik. Critical revision of the manuscript for important intellectual content: Koniaris, Wu, and Pawlik. Statistical analysis: Koniaris. Administrative, technical, and material support: Chamberlain and Pawlik. Study supervision: Wu and Pawlik.
Financial Disclosure: None reported.