Accepted for Publication: June 28, 2013.
Published Online: February 26, 2014. doi:10.1001/jamasurg.2013.3963.
Study concept and design: Cho, Underwood, Differding, Watters, Schreiber.
Acquisition of data: Louis, Sato, Geraci, Anderson, Cho, Van, Barton, Riha, Underwood, Differding, Watters.
Drafting of the manuscript: Louis.
Critical revision of the manuscript for important intellectual content: Schreiber.
Statistical analysis: Louis.
Administrative, technical, or material support: Louis, Sato, Geraci, Anderson, Cho, Van, Barton, Riha, Underwood, Differding, Watters.
Study supervision: Underwood, Differding, Schreiber.
Conflict of Interest Disclosures: None reported.
Previous Presentation: This study was presented at the Pacific Coast Surgical Association 84th Annual Meeting; February 17, 2013; Kauai, Hawaii.