Accepted for Publication: November 28, 2011.
Published Online: February 20, 2012. doi:10.1001/archsurg.2011.2281
Author Contributions:Study concept and design: Chang and Katz. Acquisition of data: Katz, Hu, and Fleming. Analysis and interpretation of data: Katz, Hu, Fleming, Pisters, Lee, and Chang. Drafting of the manuscript: Hu, Pisters, and Chang. Critical revision of the manuscript for important intellectual content: Katz, Hu, Fleming, Pisters, Lee, and Chang. Statistical analysis: Hu and Chang. Obtained funding: Katz, Fleming, and Chang. Administrative, technical, and material support: Lee. Study supervision: Pisters, Lee, and Chang.
Financial Disclosure: None reported.
Funding/Support: This study was supported in part by an American Society of Clinical Oncology Foundation Career Development Award and K07-CA133187 research grant from the National Cancer Institute to Dr Chang.