Accepted for Publication: June 29, 2013.
Published Online: December 25, 2013. doi:10.1001/jamasurg.2013.4350.
Study concept and design: All authors.
Acquisition of data: Sparapani.
Analysis and interpretation of data: All authors.
Drafting of the manuscript: Yen, Laud.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Laud, Sparapani.
Obtained funding: Yen, Nattinger.
Study supervision: Yen.
Conflict of Interest Disclosures: None reported.
Funding/Support: This research was supported by a Career Development Award and supplement K07CA125586 and K07CA125586-03S1 (Dr Yen) from the National Cancer Institute and by National Cancer Institute research grants R01CA81379 and R01CA127648 (Dr Nattinger).
Role of the Sponsors: The National Cancer Institute had no role in the design and conduct of the study; collection, management, analysis, or interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.
Disclaimer: The content does not necessarily represent the official views of the National Cancer Institute or the National Institutes of Health.
Previous Presentation: This study was presented in part as an oral presentation at the Sixth Annual Academic Surgical Congress; February 3, 2011; Huntington Beach, California.
Additional Contributions: Changbin Guo, PhD, Mikesh Shivakoti, MS, and Jianing Li, MS, conducted data analyses, and Thomas Chelius, MS, assisted with the acquisition and collection of data. They received no financial compensation for these services.