Author Contributions: As principal investigator,
Dr Branas had full access to all of the data in the study and takes responsibility
for the integrity of the data and the accuracy of the data analysis.
Study concept and design: Branas, MacKenzie,
Williams, Schwab, ReVelle.
Acquisition of data: Branas, MacKenzie, Teter,
Analysis and interpretation of data: Branas,
MacKenzie, Williams, Teter.
Drafting of the manuscript: Branas.
Critical revision of the manuscript for important
intellectual content: Branas, MacKenzie, Williams, Schwab, Teter, Flanigan,
Statistical analysis: Branas, MacKenzie, Williams.
Obtained funding: Branas, MacKenzie, Teter,
Administrative, technical, or material support:
Branas, MacKenzie, Schwab, Flanigan, Blatt, ReVelle.
Study supervision: Branas.
Financial Disclosures: None reported.
Funding/Support: This work was supported in
part by the American Trauma Society Trauma Information and Exchange Program,
grant R01HS010914 from the Agency for Healthcare Research and Quality, and
grant H28CCH319122 from the Centers for Disease Control and Prevention’s
Center for Injury Prevention and Control.
Role of the Sponsors: One or more of these
organizations were separately involved in the design and conduct of the study,
the collection and interpretation of the data, and the review and approval
of the manuscript.
Disclaimer: This article is solely the responsibility
of the authors and does not necessarily represent the official views of the
Center for Transportation Injury Research, the Association of Air Medical
Services, the US Department of Transportation, or the US Department of Health
and Human Services.
Acknowledgment: We are grateful for the contributions
and thoughtful suggestions of Anthony R. Carlini, MS, Johns Hopkins Bloomberg
School of Public Health; Jianguo Li, MSc, MS, University of Pennsylvania School
of Medicine; Louis V. Lombardo, National Highway Traffic Safety Administration;
Ryan P. Radecki, Ohio State University College of Medicine; and Sandra D.
Teitelbaum, MLS, American Trauma Society and Johns Hopkins Bloomberg School
of Public Health.