Published Online: September 3, 2014. doi:10.1001/jamasurg.2014.953.
Study concept and design: All authors.
Acquisition, analysis, or interpretation of data: Nosrati, Han, Tholpady.
Drafting of the manuscript: Nosrati, Han, Tholpady.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Nosrati, Tholpady.
Administrative, technical, or material support: Nosrati, Flores.
Study supervision: Nosrati, Flores, Sood, Tholpady.
Conflict of Interest Disclosures: None reported.
Previous Presentation: This paper was presented at the Annual Meeting of the Association of VA Surgeons; April 7, 2014; New Haven, Connecticut.