Accepted for Publication: April 10, 2014.
Published Online: August 6, 2014. doi:10.1001/jamasurg.2014.1014.
Study concept and design: Salim, Ley, Berry, Schulman, Chan.
Acquisition, analysis, or interpretation of data: Ley, Berry, Schulman, Navarro, Zheng, Chan.
Drafting of the manuscript: All authors.
Critical revision of the manuscript for important intellectual content: Berry, Schulman, Zheng, Chan.
Statistical analysis: Ley, Zheng, Chan.
Obtained funding: Salim, Chan.
Administrative, technical, or material support: 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 (Dr Salim).
Role of the Sponsor: The National Institute of Diabetes and Digestive and Kidney Diseases had no role in the design and conduct of the study; collection, management, and analysis of the data; preparation, review, or approval of the manuscript; or the decision to submit the manuscript for publication.
Previous Presentation: The study was presented at the 85th annual meeting of the Pacific Coast Surgical Association; February 15, 2014; Dana Point, California.