[1] Univ Washington, Seattle Childrens Hosp, Sch Med, Div Emergency Med,Dept Pediat, Seattle, WA USA
[2] Univ Louisville, Sch Med, Dept Pediat, Louisville, KY USA
[3] Norton Childrens Med Grp, Louisville, KY USA
[4] Ohio State Univ, Nationwide Childrens Hosp, Dept Pediat, Div Crit Care Med,Coll Med, Columbus, OH USA
[5] NYC Hlth & Hosp Jacobi, Dept Obstet & Gynecol & Womens Hlth, NCB, New York, NY USA
[6] Albert Einstein Coll Med, Bronx, NY USA
[7] Yale Univ, Dept Pediat & Emergency Med, New Haven, CT USA
[8] Univ Calgary, Alberta Childrens Hosp, Dept Pediat, Calgary, AB, Canada
[9] Geisel Sch Med, Dept Surg, Lebanon, NH USA
[10] Dartmouth Inst Hlth Policy & Clin Practice, Lebanon, NH USA
[11] Childrens Hosp Philadelphia, Philadelphia, PA USA
[12] Bernard & Millie Duker Childrens Hosp, Albany Med Coll, Dept Pediat, Div Pediat Crit Care Med, Albany, NY USA
[13] Columbia Univ, Vagelos Coll Phys & Surg, Dept Emergency Med, New York, NY USA
[14] Univ Illinois, Coll Med Chicago, Chicago, IL USA
[15] Univ Florida, Coll Med, Dept Emergency Med, Gainesville, FL USA
[16] Texas Childrens Hosp, Baylor Coll Med, Dept Pediat, Div Emergency Med, Houston, TX USA