Accepted for Publication: December 10, 2012.
Published Online: March 20, 2013. doi:10.1001/jamasurg.2013.113
Study concept and design: Wasif, Tamurian, Chirstensen, Monjazeb, Canter.
Acquisition of data: Smith, Tamurian, Canter.
Analysis and interpretation of data: Wasif, Smith, Monjazeb, Martinez, Canter.
Drafting of the manuscript: Wasif, Smith, Canter.
Critical revision of the manuscript for important intellectual content: Wasif, Tamurian, Chirstensen, Monjazeb, Martinez, Canter.
Statistical analysis: Wasif.
Administrative, technical, and material support: Tamurian, Canter.
Study supervision: Tamurian, Canter.
Conflict of Interest Disclosures: None reported.
Previous Presentation: This paper was presented at the 82nd Annual Meeting of the Pacific Coast Surgical Association; February 18-21, 2011; Phoenix, Arizona; and is published after peer review and revision.