[1] Seattle Childrens Hosp, Div Emergency Med, 4800 Sand Point Way NE, Seattle, WA 98105 USA
[2] Massachusetts Gen Hosp, Div Pediat Emergency Med, Boston, MA 02114 USA
[3] Harvard Med Sch, Dept Pediat, Boston, MA USA
[4] Harvard Med Sch, Dept Emergency Med, Boston, MA USA
[5] Boston Childrens Hosp, Boston, MA USA
[6] Cincinnati Childrens Hosp Med Ctr, Div Emergency Med, Cincinnati, OH 45229 USA
[7] Univ Cincinnati, Coll Med, Dept Pediat, Cincinnati, OH USA
[8] Univ Calif San Francisco, Dept Emergency Med & Pediat, San Francisco, CA 94143 USA
[9] Ann & Robert H Lurie Childrens Hosp Chicago, Div Emergency Med, Chicago, IL 60611 USA
[10] Northwestern Univ, Dept Pediat, Feinberg Sch Med, Chicago, IL 60611 USA
[11] Childrens Hosp Los Angeles, Div Emergency & Transport, Los Angeles, CA 90027 USA
[12] Boston Childrens Hosp, Dept Pharm, Boston, MA USA