Published Online: October 28, 2013. doi:10.1001/jamainternmed.2013.11790.
Study concept and design: Brenner, Shuryak, DeWyngaert, Formenti.
Acquisition of data: Brenner, Jozsef, DeWyngaert, Formenti.
Analysis and interpretation of data: Brenner, Shuryak.
Drafting of the manuscript: Brenner, Shuryak.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Brenner, Shuryak.
Obtained funding: Brenner.
Administrative, technical, or material support: DeWyngaert, Formenti.
Study supervision: Formenti.
Conflict of Interest Disclosures: None reported.
Correction: This article was corrected for an error in the Results section on November 15, 2013.