Accepted for Publication: April 14, 2014.
Published Online: November 26, 2014. doi:10.1001/jamasurg.2014.678.
Study concept and design: Morgan, Friedman, Senthil, Lum.
Acquisition, analysis, or interpretation of data: All authors.
Drafting of the manuscript: Morgan, Friedman, Senthil, Lum.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Morgan, Ji, Friedman, Lum.
Obtained funding: Morgan.
Administrative, technical, or material support: Morgan, Ji, Dyke, Lum.
Study supervision: Morgan, Senthil, Lum.
Conflict of Interest Disclosures: None reported.
Funding/Support: This study was supported in part by National Cancer Institute/Surveillance, Epidemiology, and End Results contracts N01-PC-35136, N01-PC-35139, and N02-PC-15105; Centers for Disease Control and Prevention/National Program for Cancer Registries contract U58DP000807-01; and the California Department of Public Health, Cancer Surveillance Branch.
Role of the Funder/Sponsor: The funding sources 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: The study was presented at the Pacific Coast Surgical Association Meeting; February 15, 2014; Dana Point, California.