Accepted for Publication: September 8, 2011.
Published Online: December 19, 2011. doi:10.1001/archsurg.2011.1327. Corrected on March 13, 2012.
Author Contributions: Study concept and design: Glance, Dick, Mukamel, and Osler. Acquisition of data: Glance. Analysis and interpretation of data: Glance, Dick, Mukamel, and Osler. Drafting of the manuscript: Glance and Dick. Critical revision of the manuscript for important intellectual content: Glance, Dick, Mukamel, and Osler. Statistical analysis: Glance, Dick, Mukamel, and Osler. Obtained funding: Glance, Dick, and Mukamel. Administrative, technical, and material support: Glance.
Financial Disclosure: None reported.
Funding/Support: This project was supported by grant RO1 HS 16737 from the Agency for Healthcare and Quality Research.
Additional Information: These data were provided by the Pennsylvania Trauma Systems Foundation, Mechanicsburg. The foundation specifically disclaims responsibility for any analyses, interpretations, or conclusions.