[1] Monash Med Ctr, Paediat Emergency Dept, Melbourne, Vic, Australia
[2] Monash Univ, Monash Hlth, Sch Clin Sci, Melbourne, Vic, Australia
[3] Paediat Res Emergency Dept Int Collaborat, New Haven, CT USA
[4] Yale Univ, Sch Med, New Haven, CT USA
[5] Pediat Emergency Med Collaborat Res Comm, Parkville, Vic, Australia
[6] Murdoch Childrens Res Inst, Emergency Res, Parkville, Vic, Australia
[7] Royal Childrens Hosp Melbourne, Emergency Dept, Parkville, Vic, Australia
[8] Univ Melbourne, Melbourne, Vic, Australia
[9] Peninsula Hlth, Frankston, Vic, Australia
[10] Univ New South Wales, Sydney, NSW, Australia
[11] Hlth Educ Training Inst, Westmead, NSW, Australia
[12] Childrens Hosp Westmead, Westmead, NSW, Australia
[13] Bristol Royal Hosp Children, Emergency Dept, Bristol, Avon, England
[14] Univ West England, Fac Hlth & Appl Sci, Bristol, Avon, England
[15] Paediat Emergency Res United Kingdom & Ireland, Bristol, Avon, England
[16] Cruces Univ Hosp, Pediat Emergency Dept, Bilbao, Spain
[17] Univ Basque Country, Bilbao, Spain
[18] Res European Pediat Emergency Med, Boston, MA USA
[19] Boston Childrens Hosp, Boston, MA USA
[20] Harvard Med Sch, Boston, MA 02115 USA
[21] Pediat Emergency Care Appl Res Network, Aurora, CO USA
[22] Childrens Hosp Colorado, Aurora, CO USA
[23] Univ Alberta, Edmonton, AB, Canada
[24] Stollery Childrens Hosp Edmonton, Edmonton, AB, Canada
[25] Womens & Childrens Hlth Res Inst, Calgary, AB, Canada
[26] Pediat Emergency Res Canada, Calgary, AB, Canada
[27] Univ Buenos Aires, Buenos Aires, DF, Argentina
[28] Hosp Pediat Prof Dr Juan P Garrahan, Buenos Aires, DF, Argentina
[29] Red Invest & Desarrollo Emergencia Pediat Latinoa, Buenos Aires, DF, Argentina
[30] Starship Childrens Hosp, Auckland, New Zealand
[31] Univ Auckland, Dept Surg, Auckland, New Zealand