[1] Univ Leicester, Hlth Sci, SAPPHIRE Grp, Leicester, Leics, England
[2] Univ Hosp Leicester NHS Trust, Paediat Emergency Med Leicester Acad PEMLA Grp, Leicester, Leics, England
[3] Univ Leicester, Sch Med, Leicester, Leics, England
[4] Northampton Gen Hosp NHS Trust, Northampton, Northants, England
[5] Imperial Coll NHS Healthcare Trust, St Marys Hosp, Dept Paediat Emergency Med, London, England
[6] Univ Coll London NHS Fdn Trust, Div Emergency Med, London, England
[7] Univ Padua, Div Pediat Emergency Med, Padua, Italy
[8] Inst Canc Res, Div Clin Studies, Hlth Informat Team, London, England
[9] Fdn Policlin Univ Agostino Gemelli IRCCS, Dept Women Child & Publ Hlth, Rome, Italy
[10] Univ Cattolica Sacro Cuore, Rome, Italy
[11] Imperial Coll London, Imperial Coll Med Sch, London, England
[12] Mater Dei Hosp, Dept Child & Adolescent Hlth, Msida, Malta
[13] Osped Paediat Meyer Firenze, Emergency Dept, Florence, Italy
[14] Osped Paediat Meyer Firenze, Trauma Ctr, Florence, Italy
[15] Erasmus Univ, Dept Gen Paediat, Rotterdam, Netherlands
[16] Heim Pal Natl Paediat Inst, Dept Paediat Emergency Med, Budapest, Hungary
[17] Hop Univ Robert Debre, Pediat Emergency Dept, Paris, France
[18] Imperial Coll London, Sect Paediat Infect Dis, London, England