Submitted for Publication: November 11, 2012; final revision received February 21, 2013; accepted February 27, 2013.
Published Online: May 16, 2013. doi:10.1001/jamaoto.2013.3001
Author Contributions: Drs Wang, Patel, Shah, Goldstein, Irish, Carvalho, Kowalski, Holland, and Gross had full access to all the data in the study and take responsibility for the integrity of the data and the accuracy of the data analysis. Study concept and design: Wang, Patel, Shah, and Gross. Acquisition of data: Patel, Shah, Goldstein, Irish, Carvalho, and Kowalski. Analysis and interpretation of data: Wang, Goldstein, Lockhart, Holland, and Gross. Drafting of the manuscript: Wang, Shah, and Irish. Critical revision of the manuscript for important intellectual content: Wang, Patel, Goldstein, Carvalho, Kowalski, Lockhart, Holland, and Gross. Statistical analysis: Wang. Administrative, technical, and material support: Wang, Shah, Irish, Carvalho, and Gross. Study supervision: Wang, Patel, Shah, and Gross.
Conflict of Interest Disclosures: None reported.
Previous Presentation: Portions of this work were presented at the Annual Meeting of the American Society of Radiation Oncology; November 1, 2010; San Diego, California.