Accepted for Publication: February 21, 2014.
Published Online: October 15, 2014. doi:10.1001/jamasurg.2014.477.
Study concept and design: Hasan, Winslow.
Acquisition, analysis, or interpretation of data: All authors.
Drafting of the manuscript: Hasan, Gegios, Winslow.
Critical revision of the manuscript for important intellectual content: Hasan, Hinshaw, Borman, Leverson.
Statistical analysis: Hasan, Gegios, Leverson, Winslow.
Administrative, technical, or material support: Hasan, Winslow.
Study supervision: Hasan, Hinshaw, Winslow.
Conflict of Interest Disclosures: None reported.
Previous Presentation: The results of this study were presented at the Americas Hepato-Pancreato-Biliary Association annual meeting; February 23, 2013; Miami, Florida.