Accepted for Publication: January 31, 2013.
Published Online: May 29, 2013. doi: 10.1001/jamasurg.2013.345
Study concept and design: Frampton, Limongelli, Jiao.
Acquisition of data: Pai, Virk, Nehru, Jackson.
Analysis and interpretation of data: Virk, Kyriakides, Jackson.
Drafting of the manuscript: Pai, Frampton, Virk, Nehru, Kyriakides.
Critical revision of the manuscript for important intellectual content: Pai, Frampton, Limongelli, Jackson, Jiao.
Statistical analysis: Pai.
Administrative, technical, and material support: Kyriakides, Jackson.
Study supervision: Jiao.
Conflict of Interest Disclosures: None reported.