Accepted for Publication: March 12, 2013.
Published Online: October 9, 2013. doi:10.1001/jamasurg.2013.2741.
Study concept and design: Jones, Wu, Robinson.
Acquisition of data: Jones, Dunn, Wu, Robinson.
Analysis and interpretation of data: Jones, Dunn, Kile, Cleveland, Robinson.
Drafting of the manuscript: Jones, Dunn, Robinson.
Critical revision of the manuscript for important intellectual content: Jones, Wu, Kile, Cleveland, Robinson.
Statistical analysis: Jones, Wu, Kile, Robinson.
Obtained funding: Robinson.
Administrative, technical, or material support: Dunn, Robinson.
Study supervision: Cleveland, Robinson.
Conflict of Interest Disclosures: None reported.
Previous Presentation: This paper was presented in part at the Annual Clinical Congress of the American College of Surgeons; October 1, 2012; Chicago, IL.