Accepted for Publication: April 12, 2012.
Published Online: July 16, 2012. doi:10.1001 /archsurg.2012.1476
Author Contributions:Study concept and design: Cisco, Tsinberg, and Shen. Acquisition of data: Cisco, Kuo, Ogawa, Scholten, and Shen. Analysis and interpretation of data: Cisco, Kuo, Scholten, Duh, Clark, Gosnell, and Shen. Drafting of the manuscript: Cisco and Ogawa. Critical revision of the manuscript for important intellectual content: Cisco, Kuo, Scholten, Tsinberg, Duh, Clark, Gosnell, and Shen. Statistical analysis: Cisco, Ogawa, Scholten, and Tsinberg. Administrative, technical, and material support: Kuo, Scholten, Tsinberg, and Duh. Study supervision: Duh, Clark, Gosnell, and Shen.
Financial Disclosure: None reported.
Previous Presentation: This paper was presented at the 83rd Annual Meeting of the Pacific Coast Surgical Association; February 20, 2012; Napa Valley, California, and is published after peer review and revision.