Accepted for Publication: April 9, 2013.
Published Online: November 13, 2013. doi:10.1001/jamasurg.2013.3967.
Study concept and design: Salim, Ley, Schulman, Navarro, Chan.
Acquisition of data: Salim, Berry, Schulman, Navarro, Zheng.
Analysis and interpretation of data: Salim, Berry, Zheng, Chan.
Drafting of the manuscript: Salim, Ley, Berry, Schulman, Navarro.
Critical revision of the manuscript for important intellectual content: Salim, Berry, Zheng, Chan.
Statistical analysis: Salim, Berry, Zheng, Chan.
Obtained funding: Salim, Chan.
Administrative, technical, and material support: Salim, Ley, Berry, Schulman, Navarro.
Study supervision: Salim, Ley.
Conflict of Interest Disclosures: None reported.
Funding/Support: This study was supported by grant 5RO1DK079667 from the National Institute of Diabetes and Digestive and Kidney Diseases.
Role of the Sponsor: The funding source had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.
Previous Presentation: This paper was presented as a poster at the 84th Annual Meeting of the Pacific Coast Surgical Association; February 17, 2013; Kauai, Hawaii.