[1] UC Hlth Mem Cent, Dept Surg, 1400 E Boulder Ave, Colorado Springs, CO 80909 USA
[2] Univ Virginia, Dept Emergency Med, Charlottesville, VA USA
[3] Univ Rochester, Dept Pharm & Emergency Med, Rochester, NY USA
[4] Univ Louisville, Hiram C Polk Jr MD Dept Surg, Div Pediat Surg, Louisville, KY 40292 USA
[5] Wichita Sedgwick Cty EMS Syst, Wichita, KS USA
[6] George Washington Univ, Sch Med, Dept Pediat & Emergency Med, Washington, DC USA
[7] Univ Minnesota, Sch Med, Dept EMS, Hennepin Healthcare Syst, Minneapolis, MN 55455 USA
[8] Univ Minnesota, Sch Med, Dept Emergency Med, Hennepin Healthcare Syst, Minneapolis, MN 55455 USA
[9] Univ Minnesota, Dept Emergency Med, Minneapolis, MN USA
[10] Emory Univ, Sch Med, Dept Emergency Med, Atlanta, GA USA
[11] Prior Ambulance Corp, Natl Assoc Emergency Med Technicians, Knoxville, TN USA
[12] Univ Rochester, Dept Surg Emergency Med & Pediat, Rochester, NY USA