Correspondence: Joshua L. Chan, MD, Department of Surgery, University of Southern California, 7415 Norris Cancer Research, NOR 7415, M/C 9180, Los Angeles, CA 90089 (joshua.l.chan@usc.edu).
Accepted for Publication: October 1, 2011.
Author Contributions: Study concept and design: Chan and Silberman. Acquisition of data: Chan and Silberman. Analysis and interpretation of data: Chan and Silberman. Drafting of the manuscript: Chan and Silberman. Critical revision of the manuscript for important intellectual content: Chan and Silberman. Administrative, technical, and material support: Chan. Study supervision: Chan and Silberman.
Financial Disclosure: None reported.