Accepted for Publication: April 17, 2014.
Published Online: July 23, 2014. doi:10.1001/jamasurg.2014.675.
Study concept and design: Whiteford, Frankhouse.
Acquisition, analysis, or interpretation of data: Geltzeiler, Rotramel, Wilson, Deng, Whiteford, Frankhouse.
Drafting of the manuscript: Geltzeiler, Rotramel, Wilson, Frankhouse.
Critical revision of the manuscript for important intellectual content: Geltzeiler, Rotramel, Wilson, Deng, Whiteford, Frankhouse.
Statistical analysis: Deng.
Administrative, technical, or material support: Geltzeiler, Rotramel, Wilson, Whiteford, Frankhouse.
Study supervision: Rotramel, Whiteford, Frankhouse.
Conflict of Interest Disclosures: None reported.
Previous Presentation: This study was presented at the 85th Annual Meeting of the Pacific Coast Surgical Association; February 15, 2014; Dana Point, California.