Accepted for Publication: August 27, 2013.
Published Online: April 9, 2014. doi:10.1001/jamasurg.2013.4930.
Study concept and design: M. D. Jafari, F. Jafari, Nguyen, Carmichael, Mills.
Acquisition, analysis, or interpretation of data: All authors.
Drafting of the manuscript: M. D. Jafari, F. Jafari, Halabi, Nguyen.
Critical revision of the manuscript for important intellectual content: M. D. Jafari, F. Jafari, Pigazzi, Carmichael, Mills, Stamos.
Statistical analysis: M. D. Jafari, F. Jafari, Nguyen.
Administrative, technical, or material support: Halabi, Pigazzi, Carmichael, Mills, Stamos.
Study supervision: Stamos.
Conflict of Interest Disclosures: None reported.
Previous Presentation: This paper was presented as a poster at the meeting of the American Society of Colon and Rectal Surgeons; April 29-30, 2013; Phoenix, Arizona.
Additional Contribution: Michael Phelan, PhD, Department of Statistics, University of California, Irvine, contributed revisions and further data inquiry after manuscript acceptance.