Accepted for Publication: May 23, 2013.
Published Online: September 25, 2013. doi:10.1001/jamasurg.2013.3721.
Study concept and design: Holman, Goldman, Kelly, Fremes, Lee, Sethi.
Acquisition of data: Holman, Wang, Goldman, Lee, Wagner, Sethi.
Analysis and interpretation of data: All authors.
Drafting of the manuscript: Holman, Davies, Lin, Sethi.
Critical revision of the manuscript for important intellectual content: Holman, Davies, Wang, Goldman, Bakaeen, Kelly, Fremes, Lee, Wagner, Sethi.
Statistical analysis: Holman, Lin, Wang, Bakaeen, Lee, Wagner, Sethi.
Obtained funding: Goldman, Wagner, Sethi.
Administrative, technical, and material support: Holman, Davies, Kelly, Lee, Wagner, Sethi.
Study supervision: Holman, Goldman, Fremes, Sethi.
Conflict of Interest Disclosures: None reported.
Group Information: The VA CSP 474 Investigators are listed at http://jama.jamanetwork.com/article.aspx?articleid=892716.
Previous Presentation: This study was presented at the 2013 Association of VA Surgeons Annual Meeting; April 22, 2013; Milwaukee, Wisconsin.