Author Contributions: Dr Freeman 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: Blum, Freeman, Dart, Cooper.
Acquisition of data: Blum, Freeman.
Analysis and interpretation of data: Blum, Freeman, Dart, Cooper.
Drafting of the manuscript: Blum, Freeman, Dart, Cooper.
Critical revision of the manuscript for important intellectual content: Freeman, Dart, Cooper.
Statistical analysis: Blum, Freeman, Dart, Cooper.
Administrative, technical, or material support: Blum, Freeman.
Study supervision: Freeman, Dart.
Financial Disclosures: Drs Dart and Cooper reported serving on the editorial board of Annals of Emergency Medicine and receiving stipends for providing editorial services. No other authors reported disclosures.
Funding/Support: This study was designed and conducted without funding or sponsorship.