[1] Univ Toronto, Pediat Emergency Med, Hosp Sick Children, 555 Univ Ave, Toronto, ON M5G 1X8, Canada
[2] Univ Toronto, Dept Pediat, 555 Univ Ave, Toronto, ON M5G 1X8, Canada
[3] UT Southwestern Med Ctr, Childrens Med Ctr Dallas, Div Pediat Emergency Med, Dallas, TX USA
[4] Univ Childrens Hosp Zurich, Emergency Dept, Zurich, Switzerland
[5] USC Keck Sch Med, Childrens Hosp Los Angeles, Div Emergency & Transport Med, Los Angeles, CA USA
[6] Hosp St Joan de Deu Barcelona, Pediat Emergency Dept, Barcelona, Spain
[7] Seattle Childrens Hosp, Seattle, WA USA
[8] Univ Washington, Sch Med, Seattle, WA USA
[9] Tel Aviv Univ, Pediat Emergency Med Unit, Shamir Med Ctr, Tel Aviv, Israel
[10] Tel Aviv Univ, Sackler Fac Med, Tel Aviv, Israel
[11] Emory Sch Med, Div Pediat Emergency Med, Childrens Healthcare Atlanta, Atlanta, GA USA
[12] Inselspital Univ Hosp Bern, Pediat Emergency Med, Bern, Switzerland
[13] Pediat Inst Italian Part Switzerland, Pediat Emergency Dept, Ticino, Switzerland
[14] Univ Saskatchewan, Jim Pattison Childrens Hosp, Pediat Emergency Med, Saskatoon, SK, Canada
[15] Univ Geneva, Dept Pediat Emergency Med, Geneva Childrens Hosp, Geneva Univ Hosp, Geneva, Switzerland
[16] Univ Geneva, Fac Med, Geneva, Switzerland
[17] Alberta Childrens Prov Gen Hosp, Pediat & Emergency Med, Calgary, AB, Canada
[18] Univ Calgary, Calgary, AB, Canada
[19] Mary Bridge Childrens Hosp, Dept Emergency Med, Tacoma, WA USA
[20] Univ Alberta, Dept Pediat, Fac Med & Dent, Women & Childrens Hlth Res Inst, Edmonton, AB, Canada
[21] Univ British Columbia, Pediat Res Emergency Therapeut PRETx Program, Div Emergency Med, Dept Pediat,BC Childrens Hosp Res Inst, Vancouver, BC, Canada