Accepted for Publication: January 28, 2013.
Author Contributions:Study concept and design: van der Wilden, Velmahos, Gross.
Acquisition of data: van der Wilden, Joseph, Jacobs, DeBusk, Adams, Gross, Burkott, Agarwal, Maung, Johnson, Gates, Kelly, Michaud, Charash, Winchell, Desjardins, Rosenblatt, Gupta, Gaeta.
Analysis and interpretation of data: van der Wilden, Velmahos, Gates, Winchell, Chang, de Moya.
Drafting of the manuscript: van der Wilden, Velmahos, Burkott, Maung, Michaud, Desjardins, Chang.
Critical revision of the manuscript for important intellectual content: Velmahos, Joseph, Jacobs, DeBusk, Adams, Gross, Agarwal, Maung, Johnson, Gates, Kelly, Charash, Winchell, Rosenblatt, Gupta, Gaeta, de Moya.
Statistical analysis: van der Wilden, Maung, Chang.
Administrative, technical, and material support: van der Wilden, Velmahos, DeBusk, Gross, Agarwal, Kelly, Desjardins.
Study supervision: Velmahos, Jacobs, Gross, Gates, Kelly, Gupta, de Moya.
Published Online: August 14, 2013. doi:10.1001/jamasurg.2013.2747.
Conflict of Interest Disclosures: None reported.
Previous Presentation: This paper was presented at the 93rd Annual Meeting of the New England Surgical Society; September 23, 2012, Rockport, Maine; and is published after peer review and revision.