Accepted for Publication: November 18, 2013.
Published Online: January 15, 2014. doi:10.1001/jamasurg.2013.5477.
Study concept and design: Regenbogen, Hardiman, Morris.
Acquisition of data: Hardiman, Morris.
Analysis and interpretation of data: All authors.
Drafting of the manuscript: Regenbogen, Hardiman, Morris.
Critical revision of the manuscript for important intellectual content: All authors.
Administrative, technical, and material support: Hardiman, Morris.
Study supervision: Regenbogen, Morris.
Conflict of Interest Disclosures: None reported.