[1] Columbia Univ, Med Ctr, Neurol Inst, New York, NY 10027 USA
[2] Oregon Hlth & Sci Univ, Dept Med Informat & Outcome Res, Portland, OR 97201 USA
[3] W Virginia Sch Med, Dept Emergency Med, Charleston, SC USA
[4] Univ Louisville, Sch Med, Div Pediat Surg, Louisville, KY 40292 USA
[5] Childrens Hosp Wisconsin, Milwaukee, WI 53201 USA
[6] Mt Sinai Sch Med, Dept Emergency Med, New York, NY 10029 USA
[7] Univ Louisville, Kosair Childrens Hosp, Louisville, KY 40292 USA
[8] Med Coll Wisconsin, Dept Emergency Med, Milwaukee, WI USA
[9] Univ Louisville, Neurol Inst, Kosair Childrens Hosp, Louisville, KY 40292 USA
[10] Denver Hlth Med Ctr, Denver, CO USA
[11] Emory Univ, Dept Emergency Med, Atlanta, GA 30322 USA
[12] Univ Maryland, Med Ctr, R Adams Cowley Shock Trauma Ctr, College Pk, MD 20742 USA
[13] Columbia Univ, Med Ctr, Div Pediat Crit Care Med, New York, NY 10027 USA