[1] Yale Sch Med, Robert Wood Johnson Fdn, Clin Scholars Program, 333 Cedar St,POB 208088, New Haven, CT 06520 USA
[2] Yale Sch Med, Dept Pediat & Emergency Med, Sect Pediat Emergency Med, New Haven, CT USA
[3] Boston Med Ctr, Dept Pediat, Boston, MA USA
[4] Massachusetts Gen Hosp, Dept Emergency Med, Boston, MA 02114 USA
[5] Childrens Hosp Assoc, Lenexa, KS USA
[6] Northwestern Univ, Ann & Robert H Lurie Childrens Hosp Chicago, Feinberg Sch Med, Div Emergency Med, Chicago, IL 60611 USA
[7] Harvard Univ, Boston Childrens Hosp, Harvard Med Sch, Dept Med,Div Gen Pediat, Boston, MA 02115 USA
[8] Harvard Univ, Boston Childrens Hosp, Harvard Med Sch, Dept Med,Div Emergency Med, Boston, MA 02115 USA
[9] Univ Penn, Dept Pediat, Perelman Sch Med, Philadelphia, PA 19104 USA
[10] Univ Penn, Dept Emergency Med, Perelman Sch Med, Philadelphia, PA 19104 USA
[11] Childrens Hosp Philadelphia, Philadelphia, PA 19104 USA
[12] Univ Texas Southwestern, Childrens Hlth Syst Texas, Dallas, TX USA
[13] Univ Texas Southwestern, Dept Pediat, Dallas, TX USA
[14] Univ Calgary, Alberta Childrens Hosp, Res Inst, Sect Pediat Emergency Med,Dept Pediat, Calgary, AB, Canada
[15] Univ Calgary, Alberta Childrens Hosp, Res Inst, Sect Gastroenterol,Dept Pediat, Calgary, AB, Canada
[16] Univ Toronto, Hosp Sick Children, Dept Pediat, Div Pediat Med, Toronto, ON, Canada
[17] Emory Univ, Sch Med, Dept Pediat & Emergency Med, Div Emergency Med, Atlanta, GA USA
[18] Childrens Healthcare Atlanta, Atlanta, GA USA
[19] Cincinnati Childrens Hosp Med Ctr, Dept Pediat, Div Hosp Med, Cincinnati, OH 45229 USA
[20] Cincinnati Childrens Hosp Med Ctr, Dept Pediat, Div Infect Dis, Cincinnati, OH 45229 USA