Accepted for Publication: November 21, 2012.
Published Online: May 8, 2013. doi:10.1001/jamasurg.2013.1431
Acquisition of data: Jarnagin and Tuorto.
Analysis and interpretation of data: Karanicolas, Gonen, Allen, and D’Angelica.
Drafting of the manuscript: Karanicolas, Gonen, Tuorto, Allen, D’Angelica, and Fong.
Critical revision of the manuscript for important intellectual content: Karanicolas, Jarnagin, DeMatteo, and D’Angelica.
Statistical analysis: Karanicolas and Gonen.
Administrative, technical, and material support: Tuorto.
Study supervision: Allen, DeMatteo, D’Angelica, and Fong.
Conflict of Interest Disclosures: None reported.
Previous Presentation: This study was presented at the American College of Surgeons Hepatobiliary Paper Session; October 6, 2010; Washington, DC.