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Xiong X, Huang L, Herd DW, Borland ML, Davidson A, Hearps S, Mackay MT, Lee KJ, Dalziel SR, Dalziel K, Cheek JA, Babl FE. Cost-effectiveness of Prednisolone to Treat Bell Palsy in Children: An Economic Evaluation Alongside a Randomized Controlled Trial. Neurology 2023; 100:e2432-e2441. [PMID: 37072220 PMCID: PMC10264054 DOI: 10.1212/wnl.0000000000207284] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Accepted: 02/27/2023] [Indexed: 04/20/2023] Open
Abstract
BACKGROUND AND OBJECTIVES Bell palsy is the third most frequent diagnosis in children with sudden-onset neurologic dysfunction. The cost-effectiveness of treating Bell palsy with prednisolone in children is unknown. We aimed to assess the cost-effectiveness of prednisolone in treating Bell palsy in children compared with placebo. METHODS This economic evaluation was a prospectively planned secondary analysis of a double-blinded, randomized, placebo-controlled superiority trial (Bell Palsy in Children [BellPIC]) conducted from 2015 to 2020. The time horizon was 6 months since randomization. Children aged 6 months to <18 years who presented within 72 hours of onset of clinician-diagnosed Bell palsy and who completed the trial were included (N = 180). Interventions were oral prednisolone or taste-matched placebo administered for 10 days. Incremental cost-effectiveness ratio comparing prednisolone with placebo was estimated. Costs were considered from a health care sector perspective and included Bell palsy-related medication cost, doctor visits, and medical tests. Effectiveness was measured using quality-adjusted life-years (QALYs) based on Child Health Utility 9D. Nonparametric bootstrapping was performed to capture uncertainties. Prespecified subgroup analysis by age 12 to <18 years vs <12 years was conducted. RESULTS The mean cost per patient was A$760 in the prednisolone group and A$693 in the placebo group over the 6-month period (difference A$66, 95% CI -A$47 to A$179). QALYs over 6 months were 0.45 in the prednisolone group and 0.44 in the placebo group (difference 0.01, 95% CI -0.01 to 0.03). The incremental cost to achieve 1 additional recovery was estimated to be A$1,577 using prednisolone compared with placebo, and cost per additional QALY gained was A$6,625 using prednisolone compared with placebo. Given a conventional willingness-to-pay threshold of A$50,000 per QALY gained (equivalent to US$35,000 or £28,000), prednisolone is very likely cost-effective (probability is 83%). Subgroup analysis suggests that this was primarily driven by the high probability of prednisolone being cost-effective in children aged 12 to <18 years (probability is 98%) and much less so for those <12 years (probability is 51%). DISCUSSION This provides new evidence to stakeholders and policymakers when considering whether to make prednisolone available in treating Bell palsy in children aged 12 to <18 years. TRIAL REGISTRATION INFORMATION Australian New Zealand Clinical Trials Registry ACTRN12615000563561.
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Affiliation(s)
- Xiuqin Xiong
- From the Centre for Health Policy (X.X., L.H., K.D.), Melbourne School of Population and Global Health, The University of Melbourne, Victoria; Emergency Department (D.H.), Queensland Children's Hospital; University of Queensland (D.W.H.); Mater Research Institute (D.H.), Brisbane, Queensland; Emergency Department (M.L.B.), Perth Children's Hospital; Divisions of Emergency Medicine and Paediatrics (M.B.), University of Western Australia, Perth; Department of Emergency Medicine (A.D., S.H., M.T.M., J.A.C., F.E.B.), Royal Children's Hospital; Murdoch Children's Research Institute (A.D., M.T.M., K.J.L., J.A.C., F.E.B., S.H.), Parkville, Victoria; Department of Anesthesia (A.D.), and Department of Neurology (M.T.M.), Royal Children's Hospital; Clinical Epidemiology and Biostatistics Unit (K.J.L.), Murdoch Children's Research Institute, Parkville, Victoria; Department of Pediatrics (K.J.L.), Melbourne Medical School, University of Melbourne, Victoria, Australia; Children's Emergency Department (S.R.D.), Starship Children's Hospital, Auckland; Departments of Surgery and Paediatrics: Child and Youth Health (S.R.D.), University of Auckland, New Zealand; and Departments of Paediatrics and Critical Care (J.A.C., F.E.B.), Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Victoria, Australia
| | - Li Huang
- From the Centre for Health Policy (X.X., L.H., K.D.), Melbourne School of Population and Global Health, The University of Melbourne, Victoria; Emergency Department (D.H.), Queensland Children's Hospital; University of Queensland (D.W.H.); Mater Research Institute (D.H.), Brisbane, Queensland; Emergency Department (M.L.B.), Perth Children's Hospital; Divisions of Emergency Medicine and Paediatrics (M.B.), University of Western Australia, Perth; Department of Emergency Medicine (A.D., S.H., M.T.M., J.A.C., F.E.B.), Royal Children's Hospital; Murdoch Children's Research Institute (A.D., M.T.M., K.J.L., J.A.C., F.E.B., S.H.), Parkville, Victoria; Department of Anesthesia (A.D.), and Department of Neurology (M.T.M.), Royal Children's Hospital; Clinical Epidemiology and Biostatistics Unit (K.J.L.), Murdoch Children's Research Institute, Parkville, Victoria; Department of Pediatrics (K.J.L.), Melbourne Medical School, University of Melbourne, Victoria, Australia; Children's Emergency Department (S.R.D.), Starship Children's Hospital, Auckland; Departments of Surgery and Paediatrics: Child and Youth Health (S.R.D.), University of Auckland, New Zealand; and Departments of Paediatrics and Critical Care (J.A.C., F.E.B.), Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Victoria, Australia
| | - David W Herd
- From the Centre for Health Policy (X.X., L.H., K.D.), Melbourne School of Population and Global Health, The University of Melbourne, Victoria; Emergency Department (D.H.), Queensland Children's Hospital; University of Queensland (D.W.H.); Mater Research Institute (D.H.), Brisbane, Queensland; Emergency Department (M.L.B.), Perth Children's Hospital; Divisions of Emergency Medicine and Paediatrics (M.B.), University of Western Australia, Perth; Department of Emergency Medicine (A.D., S.H., M.T.M., J.A.C., F.E.B.), Royal Children's Hospital; Murdoch Children's Research Institute (A.D., M.T.M., K.J.L., J.A.C., F.E.B., S.H.), Parkville, Victoria; Department of Anesthesia (A.D.), and Department of Neurology (M.T.M.), Royal Children's Hospital; Clinical Epidemiology and Biostatistics Unit (K.J.L.), Murdoch Children's Research Institute, Parkville, Victoria; Department of Pediatrics (K.J.L.), Melbourne Medical School, University of Melbourne, Victoria, Australia; Children's Emergency Department (S.R.D.), Starship Children's Hospital, Auckland; Departments of Surgery and Paediatrics: Child and Youth Health (S.R.D.), University of Auckland, New Zealand; and Departments of Paediatrics and Critical Care (J.A.C., F.E.B.), Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Victoria, Australia
| | - Meredith L Borland
- From the Centre for Health Policy (X.X., L.H., K.D.), Melbourne School of Population and Global Health, The University of Melbourne, Victoria; Emergency Department (D.H.), Queensland Children's Hospital; University of Queensland (D.W.H.); Mater Research Institute (D.H.), Brisbane, Queensland; Emergency Department (M.L.B.), Perth Children's Hospital; Divisions of Emergency Medicine and Paediatrics (M.B.), University of Western Australia, Perth; Department of Emergency Medicine (A.D., S.H., M.T.M., J.A.C., F.E.B.), Royal Children's Hospital; Murdoch Children's Research Institute (A.D., M.T.M., K.J.L., J.A.C., F.E.B., S.H.), Parkville, Victoria; Department of Anesthesia (A.D.), and Department of Neurology (M.T.M.), Royal Children's Hospital; Clinical Epidemiology and Biostatistics Unit (K.J.L.), Murdoch Children's Research Institute, Parkville, Victoria; Department of Pediatrics (K.J.L.), Melbourne Medical School, University of Melbourne, Victoria, Australia; Children's Emergency Department (S.R.D.), Starship Children's Hospital, Auckland; Departments of Surgery and Paediatrics: Child and Youth Health (S.R.D.), University of Auckland, New Zealand; and Departments of Paediatrics and Critical Care (J.A.C., F.E.B.), Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Victoria, Australia
| | - Andrew Davidson
- From the Centre for Health Policy (X.X., L.H., K.D.), Melbourne School of Population and Global Health, The University of Melbourne, Victoria; Emergency Department (D.H.), Queensland Children's Hospital; University of Queensland (D.W.H.); Mater Research Institute (D.H.), Brisbane, Queensland; Emergency Department (M.L.B.), Perth Children's Hospital; Divisions of Emergency Medicine and Paediatrics (M.B.), University of Western Australia, Perth; Department of Emergency Medicine (A.D., S.H., M.T.M., J.A.C., F.E.B.), Royal Children's Hospital; Murdoch Children's Research Institute (A.D., M.T.M., K.J.L., J.A.C., F.E.B., S.H.), Parkville, Victoria; Department of Anesthesia (A.D.), and Department of Neurology (M.T.M.), Royal Children's Hospital; Clinical Epidemiology and Biostatistics Unit (K.J.L.), Murdoch Children's Research Institute, Parkville, Victoria; Department of Pediatrics (K.J.L.), Melbourne Medical School, University of Melbourne, Victoria, Australia; Children's Emergency Department (S.R.D.), Starship Children's Hospital, Auckland; Departments of Surgery and Paediatrics: Child and Youth Health (S.R.D.), University of Auckland, New Zealand; and Departments of Paediatrics and Critical Care (J.A.C., F.E.B.), Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Victoria, Australia
| | - Stephen Hearps
- From the Centre for Health Policy (X.X., L.H., K.D.), Melbourne School of Population and Global Health, The University of Melbourne, Victoria; Emergency Department (D.H.), Queensland Children's Hospital; University of Queensland (D.W.H.); Mater Research Institute (D.H.), Brisbane, Queensland; Emergency Department (M.L.B.), Perth Children's Hospital; Divisions of Emergency Medicine and Paediatrics (M.B.), University of Western Australia, Perth; Department of Emergency Medicine (A.D., S.H., M.T.M., J.A.C., F.E.B.), Royal Children's Hospital; Murdoch Children's Research Institute (A.D., M.T.M., K.J.L., J.A.C., F.E.B., S.H.), Parkville, Victoria; Department of Anesthesia (A.D.), and Department of Neurology (M.T.M.), Royal Children's Hospital; Clinical Epidemiology and Biostatistics Unit (K.J.L.), Murdoch Children's Research Institute, Parkville, Victoria; Department of Pediatrics (K.J.L.), Melbourne Medical School, University of Melbourne, Victoria, Australia; Children's Emergency Department (S.R.D.), Starship Children's Hospital, Auckland; Departments of Surgery and Paediatrics: Child and Youth Health (S.R.D.), University of Auckland, New Zealand; and Departments of Paediatrics and Critical Care (J.A.C., F.E.B.), Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Victoria, Australia
| | - Mark T Mackay
- From the Centre for Health Policy (X.X., L.H., K.D.), Melbourne School of Population and Global Health, The University of Melbourne, Victoria; Emergency Department (D.H.), Queensland Children's Hospital; University of Queensland (D.W.H.); Mater Research Institute (D.H.), Brisbane, Queensland; Emergency Department (M.L.B.), Perth Children's Hospital; Divisions of Emergency Medicine and Paediatrics (M.B.), University of Western Australia, Perth; Department of Emergency Medicine (A.D., S.H., M.T.M., J.A.C., F.E.B.), Royal Children's Hospital; Murdoch Children's Research Institute (A.D., M.T.M., K.J.L., J.A.C., F.E.B., S.H.), Parkville, Victoria; Department of Anesthesia (A.D.), and Department of Neurology (M.T.M.), Royal Children's Hospital; Clinical Epidemiology and Biostatistics Unit (K.J.L.), Murdoch Children's Research Institute, Parkville, Victoria; Department of Pediatrics (K.J.L.), Melbourne Medical School, University of Melbourne, Victoria, Australia; Children's Emergency Department (S.R.D.), Starship Children's Hospital, Auckland; Departments of Surgery and Paediatrics: Child and Youth Health (S.R.D.), University of Auckland, New Zealand; and Departments of Paediatrics and Critical Care (J.A.C., F.E.B.), Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Victoria, Australia
| | - Katherine J Lee
- From the Centre for Health Policy (X.X., L.H., K.D.), Melbourne School of Population and Global Health, The University of Melbourne, Victoria; Emergency Department (D.H.), Queensland Children's Hospital; University of Queensland (D.W.H.); Mater Research Institute (D.H.), Brisbane, Queensland; Emergency Department (M.L.B.), Perth Children's Hospital; Divisions of Emergency Medicine and Paediatrics (M.B.), University of Western Australia, Perth; Department of Emergency Medicine (A.D., S.H., M.T.M., J.A.C., F.E.B.), Royal Children's Hospital; Murdoch Children's Research Institute (A.D., M.T.M., K.J.L., J.A.C., F.E.B., S.H.), Parkville, Victoria; Department of Anesthesia (A.D.), and Department of Neurology (M.T.M.), Royal Children's Hospital; Clinical Epidemiology and Biostatistics Unit (K.J.L.), Murdoch Children's Research Institute, Parkville, Victoria; Department of Pediatrics (K.J.L.), Melbourne Medical School, University of Melbourne, Victoria, Australia; Children's Emergency Department (S.R.D.), Starship Children's Hospital, Auckland; Departments of Surgery and Paediatrics: Child and Youth Health (S.R.D.), University of Auckland, New Zealand; and Departments of Paediatrics and Critical Care (J.A.C., F.E.B.), Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Victoria, Australia
| | - Stuart R Dalziel
- From the Centre for Health Policy (X.X., L.H., K.D.), Melbourne School of Population and Global Health, The University of Melbourne, Victoria; Emergency Department (D.H.), Queensland Children's Hospital; University of Queensland (D.W.H.); Mater Research Institute (D.H.), Brisbane, Queensland; Emergency Department (M.L.B.), Perth Children's Hospital; Divisions of Emergency Medicine and Paediatrics (M.B.), University of Western Australia, Perth; Department of Emergency Medicine (A.D., S.H., M.T.M., J.A.C., F.E.B.), Royal Children's Hospital; Murdoch Children's Research Institute (A.D., M.T.M., K.J.L., J.A.C., F.E.B., S.H.), Parkville, Victoria; Department of Anesthesia (A.D.), and Department of Neurology (M.T.M.), Royal Children's Hospital; Clinical Epidemiology and Biostatistics Unit (K.J.L.), Murdoch Children's Research Institute, Parkville, Victoria; Department of Pediatrics (K.J.L.), Melbourne Medical School, University of Melbourne, Victoria, Australia; Children's Emergency Department (S.R.D.), Starship Children's Hospital, Auckland; Departments of Surgery and Paediatrics: Child and Youth Health (S.R.D.), University of Auckland, New Zealand; and Departments of Paediatrics and Critical Care (J.A.C., F.E.B.), Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Victoria, Australia
| | - Kim Dalziel
- From the Centre for Health Policy (X.X., L.H., K.D.), Melbourne School of Population and Global Health, The University of Melbourne, Victoria; Emergency Department (D.H.), Queensland Children's Hospital; University of Queensland (D.W.H.); Mater Research Institute (D.H.), Brisbane, Queensland; Emergency Department (M.L.B.), Perth Children's Hospital; Divisions of Emergency Medicine and Paediatrics (M.B.), University of Western Australia, Perth; Department of Emergency Medicine (A.D., S.H., M.T.M., J.A.C., F.E.B.), Royal Children's Hospital; Murdoch Children's Research Institute (A.D., M.T.M., K.J.L., J.A.C., F.E.B., S.H.), Parkville, Victoria; Department of Anesthesia (A.D.), and Department of Neurology (M.T.M.), Royal Children's Hospital; Clinical Epidemiology and Biostatistics Unit (K.J.L.), Murdoch Children's Research Institute, Parkville, Victoria; Department of Pediatrics (K.J.L.), Melbourne Medical School, University of Melbourne, Victoria, Australia; Children's Emergency Department (S.R.D.), Starship Children's Hospital, Auckland; Departments of Surgery and Paediatrics: Child and Youth Health (S.R.D.), University of Auckland, New Zealand; and Departments of Paediatrics and Critical Care (J.A.C., F.E.B.), Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Victoria, Australia
| | - John A Cheek
- From the Centre for Health Policy (X.X., L.H., K.D.), Melbourne School of Population and Global Health, The University of Melbourne, Victoria; Emergency Department (D.H.), Queensland Children's Hospital; University of Queensland (D.W.H.); Mater Research Institute (D.H.), Brisbane, Queensland; Emergency Department (M.L.B.), Perth Children's Hospital; Divisions of Emergency Medicine and Paediatrics (M.B.), University of Western Australia, Perth; Department of Emergency Medicine (A.D., S.H., M.T.M., J.A.C., F.E.B.), Royal Children's Hospital; Murdoch Children's Research Institute (A.D., M.T.M., K.J.L., J.A.C., F.E.B., S.H.), Parkville, Victoria; Department of Anesthesia (A.D.), and Department of Neurology (M.T.M.), Royal Children's Hospital; Clinical Epidemiology and Biostatistics Unit (K.J.L.), Murdoch Children's Research Institute, Parkville, Victoria; Department of Pediatrics (K.J.L.), Melbourne Medical School, University of Melbourne, Victoria, Australia; Children's Emergency Department (S.R.D.), Starship Children's Hospital, Auckland; Departments of Surgery and Paediatrics: Child and Youth Health (S.R.D.), University of Auckland, New Zealand; and Departments of Paediatrics and Critical Care (J.A.C., F.E.B.), Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Victoria, Australia
| | - Franz E Babl
- From the Centre for Health Policy (X.X., L.H., K.D.), Melbourne School of Population and Global Health, The University of Melbourne, Victoria; Emergency Department (D.H.), Queensland Children's Hospital; University of Queensland (D.W.H.); Mater Research Institute (D.H.), Brisbane, Queensland; Emergency Department (M.L.B.), Perth Children's Hospital; Divisions of Emergency Medicine and Paediatrics (M.B.), University of Western Australia, Perth; Department of Emergency Medicine (A.D., S.H., M.T.M., J.A.C., F.E.B.), Royal Children's Hospital; Murdoch Children's Research Institute (A.D., M.T.M., K.J.L., J.A.C., F.E.B., S.H.), Parkville, Victoria; Department of Anesthesia (A.D.), and Department of Neurology (M.T.M.), Royal Children's Hospital; Clinical Epidemiology and Biostatistics Unit (K.J.L.), Murdoch Children's Research Institute, Parkville, Victoria; Department of Pediatrics (K.J.L.), Melbourne Medical School, University of Melbourne, Victoria, Australia; Children's Emergency Department (S.R.D.), Starship Children's Hospital, Auckland; Departments of Surgery and Paediatrics: Child and Youth Health (S.R.D.), University of Auckland, New Zealand; and Departments of Paediatrics and Critical Care (J.A.C., F.E.B.), Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Victoria, Australia.
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Babl FE, Herd D, Borland ML, Kochar A, Lawton B, Hort J, West A, George S, Zhang M, Velusamy K, Sullivan F, Oakley E, Davidson A, Hopper SM, Cheek JA, Berkowitz RG, Hearps S, Wilson CL, Williams A, Elborough H, Legge D, Mackay MT, Lee KJ, Dalziel SR. Efficacy of Prednisolone for Bell Palsy in Children: A Randomized, Double-Blind, Placebo-Controlled, Multicenter Trial. Neurology 2022; 99:e2241-e2252. [PMID: 36008143 DOI: 10.1212/wnl.0000000000201164] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Accepted: 07/11/2022] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND AND OBJECTIVES Corticosteroids are used to treat the early stages of idiopathic facial paralysis (Bell palsy) in children, but their effectiveness is uncertain. We set out to determine whether prednisolone improves the proportion of children with Bell palsy with complete recovery at 1 month. METHODS We conducted a double-blind, placebo-controlled, randomized trial of prednisolone in children presenting to emergency departments with Bell palsy. Patients aged 6 months to younger than 18 years were recruited within 72 hours after the symptom onset and were randomly assigned to receive 10 days of treatment with oral prednisolone (approximately 1 mg/kg) or placebo. The primary outcome was complete recovery of facial function at 1 month rated on the House-Brackmann scale. Secondary outcomes included facial function, adverse events, and pain up to 6 months. Target recruitment was n = 540 (270 per group). RESULTS Between October 13, 2015, and August 23, 2020, 187 children were randomized (94 to prednisolone and 93 to placebo) and included in the intention-to-treat analysis. At 1 month, the proportions of patients who had recovered facial function were 49% (n = 43/87) in the prednisolone group compared with 57% (n = 50/87) in the placebo group (risk difference -8.1%, 95% CI -22.8 to 6.7; adjusted odds ratio [aOR] 0.7, 95% CI 0.4 to 1.3). At 3 months, these proportions were 90% (n = 71/79) for the prednisolone group vs 85% (n = 72/85) for the placebo group (risk difference 5.2%, 95% CI -5.0 to 15.3; aOR 1.2, 95% CI 0.4 to 3.0) and, at 6 months, 99% (n = 77/78) and 93% (n = 76/82), respectively (risk difference 6.0%, 95% CI -0.1 to 12.2; aOR 3.0, 95% CI 0.5 to 17.7). There were no serious adverse events and little evidence for group differences in secondary outcomes. DISCUSSION In children with Bell palsy, the vast majority recover without treatment. This study, although underpowered, does not provide evidence that early treatment with prednisolone improves complete recovery. TRIAL REGISTRATION INFORMATION Registered with the Australian New Zealand Clinical Trials Registry ACTRN12615000563561, registered June 1, 2015. anzctr.org.au/Trial/Registration/TrialReview.aspx?id=368505&isReview=true. CLASSIFICATION OF EVIDENCE This study provides Class I evidence that for children with Bell palsy, prednisolone does not significantly change recovery of complete facial function at 1 month. However, this study lacked the precision to exclude an important harm or benefit from prednisolone.
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Affiliation(s)
- Franz E Babl
- From the Emergency Department (F.E.B., E.O., S.M.H., J.A.C., A. Williams, H.E.), Royal Children's Hospital; Clinical Sciences (F.E.B., E.O., A.D., S.M.H., J.A.C., R.G.B., S.H., C.L.W., A. Williams, H.E., M.T.M.), Murdoch Children's Research Institute, Parkville; Departments of Paediatrics (F.E.B., E.O., A.D., S.M.H., R.G.B., M.T.M., K.J.L.) and Critical Care (F.E.B., E.O., S.H.), Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Victoria; Emergency Department (D.H.), Queensland Children's Hospital; University of Queensland (D.H.); Mater Research Institute (D.H.), Brisbane, Queensland; Emergency Department (M.L.B.), Perth Children's Hospital; Divisions of Emergency Medicine and Paediatrics (M.L.B.), University of Western Australia, Perth; Emergency Department (A.K.), Women's and Children's Hospital, Adelaide; Emergency Department (B.L.), Logan Hospital, Brisbane, Queensland; Emergency Department (J.H.), The Children's Hospital at Westmead, Sydney; Emergency Department (A. West, J.A.C.), Monash Medical Centre, Clayton, Victoria; Department of Emergency Medicine (S.G.), Gold Coast University Hospital, Southport; School of Medicine and Menzies Health Institute Queensland (S.G.), Griffith University, Southport; Child Health Research Centre (S.G.), The University of Queensland, South Brisbane; Emergency Department (M.Z.), John Hunter Hospital, Newcastle, New South Wales; Emergency Department (K.V.), Townsville Hospital; James Cook University College of Medicine and Dentistry (K.V.), Townsville, Australia; University of St Andrews (F.S.), School of Medicine, Edinburgh, United Kingdom; North York General Hospital (F.S.), Department of Family & Community Medicine and Dalla Lana School of Public Health, University of Toronto, Ontario, Canada; Department of Anaesthesia (A.D.), Royal Children's Hospital; Department of Otolaryngology (R.G.B.), Pharmacy Department (D.L.), and Department of Neurology (M.T.M.), Royal Children's Hospital; Clinical Epidemiology and Biostatistics Unit (K.J.L.) and Melbourne Children's Trial Centre (A.D., K.J.L.), Murdoch Children's Research Institute, Parkville, Victoria, Australia; Children's Emergency Department (S.R.D.), Starship Children's Hospital, Auckland; and Departments of Surgery and Paediatrics: Child and Youth Health (S.R.D.), University of Auckland, New Zealand.
| | - David Herd
- From the Emergency Department (F.E.B., E.O., S.M.H., J.A.C., A. Williams, H.E.), Royal Children's Hospital; Clinical Sciences (F.E.B., E.O., A.D., S.M.H., J.A.C., R.G.B., S.H., C.L.W., A. Williams, H.E., M.T.M.), Murdoch Children's Research Institute, Parkville; Departments of Paediatrics (F.E.B., E.O., A.D., S.M.H., R.G.B., M.T.M., K.J.L.) and Critical Care (F.E.B., E.O., S.H.), Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Victoria; Emergency Department (D.H.), Queensland Children's Hospital; University of Queensland (D.H.); Mater Research Institute (D.H.), Brisbane, Queensland; Emergency Department (M.L.B.), Perth Children's Hospital; Divisions of Emergency Medicine and Paediatrics (M.L.B.), University of Western Australia, Perth; Emergency Department (A.K.), Women's and Children's Hospital, Adelaide; Emergency Department (B.L.), Logan Hospital, Brisbane, Queensland; Emergency Department (J.H.), The Children's Hospital at Westmead, Sydney; Emergency Department (A. West, J.A.C.), Monash Medical Centre, Clayton, Victoria; Department of Emergency Medicine (S.G.), Gold Coast University Hospital, Southport; School of Medicine and Menzies Health Institute Queensland (S.G.), Griffith University, Southport; Child Health Research Centre (S.G.), The University of Queensland, South Brisbane; Emergency Department (M.Z.), John Hunter Hospital, Newcastle, New South Wales; Emergency Department (K.V.), Townsville Hospital; James Cook University College of Medicine and Dentistry (K.V.), Townsville, Australia; University of St Andrews (F.S.), School of Medicine, Edinburgh, United Kingdom; North York General Hospital (F.S.), Department of Family & Community Medicine and Dalla Lana School of Public Health, University of Toronto, Ontario, Canada; Department of Anaesthesia (A.D.), Royal Children's Hospital; Department of Otolaryngology (R.G.B.), Pharmacy Department (D.L.), and Department of Neurology (M.T.M.), Royal Children's Hospital; Clinical Epidemiology and Biostatistics Unit (K.J.L.) and Melbourne Children's Trial Centre (A.D., K.J.L.), Murdoch Children's Research Institute, Parkville, Victoria, Australia; Children's Emergency Department (S.R.D.), Starship Children's Hospital, Auckland; and Departments of Surgery and Paediatrics: Child and Youth Health (S.R.D.), University of Auckland, New Zealand
| | - Meredith L Borland
- From the Emergency Department (F.E.B., E.O., S.M.H., J.A.C., A. Williams, H.E.), Royal Children's Hospital; Clinical Sciences (F.E.B., E.O., A.D., S.M.H., J.A.C., R.G.B., S.H., C.L.W., A. Williams, H.E., M.T.M.), Murdoch Children's Research Institute, Parkville; Departments of Paediatrics (F.E.B., E.O., A.D., S.M.H., R.G.B., M.T.M., K.J.L.) and Critical Care (F.E.B., E.O., S.H.), Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Victoria; Emergency Department (D.H.), Queensland Children's Hospital; University of Queensland (D.H.); Mater Research Institute (D.H.), Brisbane, Queensland; Emergency Department (M.L.B.), Perth Children's Hospital; Divisions of Emergency Medicine and Paediatrics (M.L.B.), University of Western Australia, Perth; Emergency Department (A.K.), Women's and Children's Hospital, Adelaide; Emergency Department (B.L.), Logan Hospital, Brisbane, Queensland; Emergency Department (J.H.), The Children's Hospital at Westmead, Sydney; Emergency Department (A. West, J.A.C.), Monash Medical Centre, Clayton, Victoria; Department of Emergency Medicine (S.G.), Gold Coast University Hospital, Southport; School of Medicine and Menzies Health Institute Queensland (S.G.), Griffith University, Southport; Child Health Research Centre (S.G.), The University of Queensland, South Brisbane; Emergency Department (M.Z.), John Hunter Hospital, Newcastle, New South Wales; Emergency Department (K.V.), Townsville Hospital; James Cook University College of Medicine and Dentistry (K.V.), Townsville, Australia; University of St Andrews (F.S.), School of Medicine, Edinburgh, United Kingdom; North York General Hospital (F.S.), Department of Family & Community Medicine and Dalla Lana School of Public Health, University of Toronto, Ontario, Canada; Department of Anaesthesia (A.D.), Royal Children's Hospital; Department of Otolaryngology (R.G.B.), Pharmacy Department (D.L.), and Department of Neurology (M.T.M.), Royal Children's Hospital; Clinical Epidemiology and Biostatistics Unit (K.J.L.) and Melbourne Children's Trial Centre (A.D., K.J.L.), Murdoch Children's Research Institute, Parkville, Victoria, Australia; Children's Emergency Department (S.R.D.), Starship Children's Hospital, Auckland; and Departments of Surgery and Paediatrics: Child and Youth Health (S.R.D.), University of Auckland, New Zealand
| | - Amit Kochar
- From the Emergency Department (F.E.B., E.O., S.M.H., J.A.C., A. Williams, H.E.), Royal Children's Hospital; Clinical Sciences (F.E.B., E.O., A.D., S.M.H., J.A.C., R.G.B., S.H., C.L.W., A. Williams, H.E., M.T.M.), Murdoch Children's Research Institute, Parkville; Departments of Paediatrics (F.E.B., E.O., A.D., S.M.H., R.G.B., M.T.M., K.J.L.) and Critical Care (F.E.B., E.O., S.H.), Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Victoria; Emergency Department (D.H.), Queensland Children's Hospital; University of Queensland (D.H.); Mater Research Institute (D.H.), Brisbane, Queensland; Emergency Department (M.L.B.), Perth Children's Hospital; Divisions of Emergency Medicine and Paediatrics (M.L.B.), University of Western Australia, Perth; Emergency Department (A.K.), Women's and Children's Hospital, Adelaide; Emergency Department (B.L.), Logan Hospital, Brisbane, Queensland; Emergency Department (J.H.), The Children's Hospital at Westmead, Sydney; Emergency Department (A. West, J.A.C.), Monash Medical Centre, Clayton, Victoria; Department of Emergency Medicine (S.G.), Gold Coast University Hospital, Southport; School of Medicine and Menzies Health Institute Queensland (S.G.), Griffith University, Southport; Child Health Research Centre (S.G.), The University of Queensland, South Brisbane; Emergency Department (M.Z.), John Hunter Hospital, Newcastle, New South Wales; Emergency Department (K.V.), Townsville Hospital; James Cook University College of Medicine and Dentistry (K.V.), Townsville, Australia; University of St Andrews (F.S.), School of Medicine, Edinburgh, United Kingdom; North York General Hospital (F.S.), Department of Family & Community Medicine and Dalla Lana School of Public Health, University of Toronto, Ontario, Canada; Department of Anaesthesia (A.D.), Royal Children's Hospital; Department of Otolaryngology (R.G.B.), Pharmacy Department (D.L.), and Department of Neurology (M.T.M.), Royal Children's Hospital; Clinical Epidemiology and Biostatistics Unit (K.J.L.) and Melbourne Children's Trial Centre (A.D., K.J.L.), Murdoch Children's Research Institute, Parkville, Victoria, Australia; Children's Emergency Department (S.R.D.), Starship Children's Hospital, Auckland; and Departments of Surgery and Paediatrics: Child and Youth Health (S.R.D.), University of Auckland, New Zealand
| | - Ben Lawton
- From the Emergency Department (F.E.B., E.O., S.M.H., J.A.C., A. Williams, H.E.), Royal Children's Hospital; Clinical Sciences (F.E.B., E.O., A.D., S.M.H., J.A.C., R.G.B., S.H., C.L.W., A. Williams, H.E., M.T.M.), Murdoch Children's Research Institute, Parkville; Departments of Paediatrics (F.E.B., E.O., A.D., S.M.H., R.G.B., M.T.M., K.J.L.) and Critical Care (F.E.B., E.O., S.H.), Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Victoria; Emergency Department (D.H.), Queensland Children's Hospital; University of Queensland (D.H.); Mater Research Institute (D.H.), Brisbane, Queensland; Emergency Department (M.L.B.), Perth Children's Hospital; Divisions of Emergency Medicine and Paediatrics (M.L.B.), University of Western Australia, Perth; Emergency Department (A.K.), Women's and Children's Hospital, Adelaide; Emergency Department (B.L.), Logan Hospital, Brisbane, Queensland; Emergency Department (J.H.), The Children's Hospital at Westmead, Sydney; Emergency Department (A. West, J.A.C.), Monash Medical Centre, Clayton, Victoria; Department of Emergency Medicine (S.G.), Gold Coast University Hospital, Southport; School of Medicine and Menzies Health Institute Queensland (S.G.), Griffith University, Southport; Child Health Research Centre (S.G.), The University of Queensland, South Brisbane; Emergency Department (M.Z.), John Hunter Hospital, Newcastle, New South Wales; Emergency Department (K.V.), Townsville Hospital; James Cook University College of Medicine and Dentistry (K.V.), Townsville, Australia; University of St Andrews (F.S.), School of Medicine, Edinburgh, United Kingdom; North York General Hospital (F.S.), Department of Family & Community Medicine and Dalla Lana School of Public Health, University of Toronto, Ontario, Canada; Department of Anaesthesia (A.D.), Royal Children's Hospital; Department of Otolaryngology (R.G.B.), Pharmacy Department (D.L.), and Department of Neurology (M.T.M.), Royal Children's Hospital; Clinical Epidemiology and Biostatistics Unit (K.J.L.) and Melbourne Children's Trial Centre (A.D., K.J.L.), Murdoch Children's Research Institute, Parkville, Victoria, Australia; Children's Emergency Department (S.R.D.), Starship Children's Hospital, Auckland; and Departments of Surgery and Paediatrics: Child and Youth Health (S.R.D.), University of Auckland, New Zealand
| | - Jason Hort
- From the Emergency Department (F.E.B., E.O., S.M.H., J.A.C., A. Williams, H.E.), Royal Children's Hospital; Clinical Sciences (F.E.B., E.O., A.D., S.M.H., J.A.C., R.G.B., S.H., C.L.W., A. Williams, H.E., M.T.M.), Murdoch Children's Research Institute, Parkville; Departments of Paediatrics (F.E.B., E.O., A.D., S.M.H., R.G.B., M.T.M., K.J.L.) and Critical Care (F.E.B., E.O., S.H.), Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Victoria; Emergency Department (D.H.), Queensland Children's Hospital; University of Queensland (D.H.); Mater Research Institute (D.H.), Brisbane, Queensland; Emergency Department (M.L.B.), Perth Children's Hospital; Divisions of Emergency Medicine and Paediatrics (M.L.B.), University of Western Australia, Perth; Emergency Department (A.K.), Women's and Children's Hospital, Adelaide; Emergency Department (B.L.), Logan Hospital, Brisbane, Queensland; Emergency Department (J.H.), The Children's Hospital at Westmead, Sydney; Emergency Department (A. West, J.A.C.), Monash Medical Centre, Clayton, Victoria; Department of Emergency Medicine (S.G.), Gold Coast University Hospital, Southport; School of Medicine and Menzies Health Institute Queensland (S.G.), Griffith University, Southport; Child Health Research Centre (S.G.), The University of Queensland, South Brisbane; Emergency Department (M.Z.), John Hunter Hospital, Newcastle, New South Wales; Emergency Department (K.V.), Townsville Hospital; James Cook University College of Medicine and Dentistry (K.V.), Townsville, Australia; University of St Andrews (F.S.), School of Medicine, Edinburgh, United Kingdom; North York General Hospital (F.S.), Department of Family & Community Medicine and Dalla Lana School of Public Health, University of Toronto, Ontario, Canada; Department of Anaesthesia (A.D.), Royal Children's Hospital; Department of Otolaryngology (R.G.B.), Pharmacy Department (D.L.), and Department of Neurology (M.T.M.), Royal Children's Hospital; Clinical Epidemiology and Biostatistics Unit (K.J.L.) and Melbourne Children's Trial Centre (A.D., K.J.L.), Murdoch Children's Research Institute, Parkville, Victoria, Australia; Children's Emergency Department (S.R.D.), Starship Children's Hospital, Auckland; and Departments of Surgery and Paediatrics: Child and Youth Health (S.R.D.), University of Auckland, New Zealand
| | - Adam West
- From the Emergency Department (F.E.B., E.O., S.M.H., J.A.C., A. Williams, H.E.), Royal Children's Hospital; Clinical Sciences (F.E.B., E.O., A.D., S.M.H., J.A.C., R.G.B., S.H., C.L.W., A. Williams, H.E., M.T.M.), Murdoch Children's Research Institute, Parkville; Departments of Paediatrics (F.E.B., E.O., A.D., S.M.H., R.G.B., M.T.M., K.J.L.) and Critical Care (F.E.B., E.O., S.H.), Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Victoria; Emergency Department (D.H.), Queensland Children's Hospital; University of Queensland (D.H.); Mater Research Institute (D.H.), Brisbane, Queensland; Emergency Department (M.L.B.), Perth Children's Hospital; Divisions of Emergency Medicine and Paediatrics (M.L.B.), University of Western Australia, Perth; Emergency Department (A.K.), Women's and Children's Hospital, Adelaide; Emergency Department (B.L.), Logan Hospital, Brisbane, Queensland; Emergency Department (J.H.), The Children's Hospital at Westmead, Sydney; Emergency Department (A. West, J.A.C.), Monash Medical Centre, Clayton, Victoria; Department of Emergency Medicine (S.G.), Gold Coast University Hospital, Southport; School of Medicine and Menzies Health Institute Queensland (S.G.), Griffith University, Southport; Child Health Research Centre (S.G.), The University of Queensland, South Brisbane; Emergency Department (M.Z.), John Hunter Hospital, Newcastle, New South Wales; Emergency Department (K.V.), Townsville Hospital; James Cook University College of Medicine and Dentistry (K.V.), Townsville, Australia; University of St Andrews (F.S.), School of Medicine, Edinburgh, United Kingdom; North York General Hospital (F.S.), Department of Family & Community Medicine and Dalla Lana School of Public Health, University of Toronto, Ontario, Canada; Department of Anaesthesia (A.D.), Royal Children's Hospital; Department of Otolaryngology (R.G.B.), Pharmacy Department (D.L.), and Department of Neurology (M.T.M.), Royal Children's Hospital; Clinical Epidemiology and Biostatistics Unit (K.J.L.) and Melbourne Children's Trial Centre (A.D., K.J.L.), Murdoch Children's Research Institute, Parkville, Victoria, Australia; Children's Emergency Department (S.R.D.), Starship Children's Hospital, Auckland; and Departments of Surgery and Paediatrics: Child and Youth Health (S.R.D.), University of Auckland, New Zealand
| | - Shane George
- From the Emergency Department (F.E.B., E.O., S.M.H., J.A.C., A. Williams, H.E.), Royal Children's Hospital; Clinical Sciences (F.E.B., E.O., A.D., S.M.H., J.A.C., R.G.B., S.H., C.L.W., A. Williams, H.E., M.T.M.), Murdoch Children's Research Institute, Parkville; Departments of Paediatrics (F.E.B., E.O., A.D., S.M.H., R.G.B., M.T.M., K.J.L.) and Critical Care (F.E.B., E.O., S.H.), Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Victoria; Emergency Department (D.H.), Queensland Children's Hospital; University of Queensland (D.H.); Mater Research Institute (D.H.), Brisbane, Queensland; Emergency Department (M.L.B.), Perth Children's Hospital; Divisions of Emergency Medicine and Paediatrics (M.L.B.), University of Western Australia, Perth; Emergency Department (A.K.), Women's and Children's Hospital, Adelaide; Emergency Department (B.L.), Logan Hospital, Brisbane, Queensland; Emergency Department (J.H.), The Children's Hospital at Westmead, Sydney; Emergency Department (A. West, J.A.C.), Monash Medical Centre, Clayton, Victoria; Department of Emergency Medicine (S.G.), Gold Coast University Hospital, Southport; School of Medicine and Menzies Health Institute Queensland (S.G.), Griffith University, Southport; Child Health Research Centre (S.G.), The University of Queensland, South Brisbane; Emergency Department (M.Z.), John Hunter Hospital, Newcastle, New South Wales; Emergency Department (K.V.), Townsville Hospital; James Cook University College of Medicine and Dentistry (K.V.), Townsville, Australia; University of St Andrews (F.S.), School of Medicine, Edinburgh, United Kingdom; North York General Hospital (F.S.), Department of Family & Community Medicine and Dalla Lana School of Public Health, University of Toronto, Ontario, Canada; Department of Anaesthesia (A.D.), Royal Children's Hospital; Department of Otolaryngology (R.G.B.), Pharmacy Department (D.L.), and Department of Neurology (M.T.M.), Royal Children's Hospital; Clinical Epidemiology and Biostatistics Unit (K.J.L.) and Melbourne Children's Trial Centre (A.D., K.J.L.), Murdoch Children's Research Institute, Parkville, Victoria, Australia; Children's Emergency Department (S.R.D.), Starship Children's Hospital, Auckland; and Departments of Surgery and Paediatrics: Child and Youth Health (S.R.D.), University of Auckland, New Zealand
| | - Michael Zhang
- From the Emergency Department (F.E.B., E.O., S.M.H., J.A.C., A. Williams, H.E.), Royal Children's Hospital; Clinical Sciences (F.E.B., E.O., A.D., S.M.H., J.A.C., R.G.B., S.H., C.L.W., A. Williams, H.E., M.T.M.), Murdoch Children's Research Institute, Parkville; Departments of Paediatrics (F.E.B., E.O., A.D., S.M.H., R.G.B., M.T.M., K.J.L.) and Critical Care (F.E.B., E.O., S.H.), Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Victoria; Emergency Department (D.H.), Queensland Children's Hospital; University of Queensland (D.H.); Mater Research Institute (D.H.), Brisbane, Queensland; Emergency Department (M.L.B.), Perth Children's Hospital; Divisions of Emergency Medicine and Paediatrics (M.L.B.), University of Western Australia, Perth; Emergency Department (A.K.), Women's and Children's Hospital, Adelaide; Emergency Department (B.L.), Logan Hospital, Brisbane, Queensland; Emergency Department (J.H.), The Children's Hospital at Westmead, Sydney; Emergency Department (A. West, J.A.C.), Monash Medical Centre, Clayton, Victoria; Department of Emergency Medicine (S.G.), Gold Coast University Hospital, Southport; School of Medicine and Menzies Health Institute Queensland (S.G.), Griffith University, Southport; Child Health Research Centre (S.G.), The University of Queensland, South Brisbane; Emergency Department (M.Z.), John Hunter Hospital, Newcastle, New South Wales; Emergency Department (K.V.), Townsville Hospital; James Cook University College of Medicine and Dentistry (K.V.), Townsville, Australia; University of St Andrews (F.S.), School of Medicine, Edinburgh, United Kingdom; North York General Hospital (F.S.), Department of Family & Community Medicine and Dalla Lana School of Public Health, University of Toronto, Ontario, Canada; Department of Anaesthesia (A.D.), Royal Children's Hospital; Department of Otolaryngology (R.G.B.), Pharmacy Department (D.L.), and Department of Neurology (M.T.M.), Royal Children's Hospital; Clinical Epidemiology and Biostatistics Unit (K.J.L.) and Melbourne Children's Trial Centre (A.D., K.J.L.), Murdoch Children's Research Institute, Parkville, Victoria, Australia; Children's Emergency Department (S.R.D.), Starship Children's Hospital, Auckland; and Departments of Surgery and Paediatrics: Child and Youth Health (S.R.D.), University of Auckland, New Zealand
| | - Karthik Velusamy
- From the Emergency Department (F.E.B., E.O., S.M.H., J.A.C., A. Williams, H.E.), Royal Children's Hospital; Clinical Sciences (F.E.B., E.O., A.D., S.M.H., J.A.C., R.G.B., S.H., C.L.W., A. Williams, H.E., M.T.M.), Murdoch Children's Research Institute, Parkville; Departments of Paediatrics (F.E.B., E.O., A.D., S.M.H., R.G.B., M.T.M., K.J.L.) and Critical Care (F.E.B., E.O., S.H.), Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Victoria; Emergency Department (D.H.), Queensland Children's Hospital; University of Queensland (D.H.); Mater Research Institute (D.H.), Brisbane, Queensland; Emergency Department (M.L.B.), Perth Children's Hospital; Divisions of Emergency Medicine and Paediatrics (M.L.B.), University of Western Australia, Perth; Emergency Department (A.K.), Women's and Children's Hospital, Adelaide; Emergency Department (B.L.), Logan Hospital, Brisbane, Queensland; Emergency Department (J.H.), The Children's Hospital at Westmead, Sydney; Emergency Department (A. West, J.A.C.), Monash Medical Centre, Clayton, Victoria; Department of Emergency Medicine (S.G.), Gold Coast University Hospital, Southport; School of Medicine and Menzies Health Institute Queensland (S.G.), Griffith University, Southport; Child Health Research Centre (S.G.), The University of Queensland, South Brisbane; Emergency Department (M.Z.), John Hunter Hospital, Newcastle, New South Wales; Emergency Department (K.V.), Townsville Hospital; James Cook University College of Medicine and Dentistry (K.V.), Townsville, Australia; University of St Andrews (F.S.), School of Medicine, Edinburgh, United Kingdom; North York General Hospital (F.S.), Department of Family & Community Medicine and Dalla Lana School of Public Health, University of Toronto, Ontario, Canada; Department of Anaesthesia (A.D.), Royal Children's Hospital; Department of Otolaryngology (R.G.B.), Pharmacy Department (D.L.), and Department of Neurology (M.T.M.), Royal Children's Hospital; Clinical Epidemiology and Biostatistics Unit (K.J.L.) and Melbourne Children's Trial Centre (A.D., K.J.L.), Murdoch Children's Research Institute, Parkville, Victoria, Australia; Children's Emergency Department (S.R.D.), Starship Children's Hospital, Auckland; and Departments of Surgery and Paediatrics: Child and Youth Health (S.R.D.), University of Auckland, New Zealand
| | - Frank Sullivan
- From the Emergency Department (F.E.B., E.O., S.M.H., J.A.C., A. Williams, H.E.), Royal Children's Hospital; Clinical Sciences (F.E.B., E.O., A.D., S.M.H., J.A.C., R.G.B., S.H., C.L.W., A. Williams, H.E., M.T.M.), Murdoch Children's Research Institute, Parkville; Departments of Paediatrics (F.E.B., E.O., A.D., S.M.H., R.G.B., M.T.M., K.J.L.) and Critical Care (F.E.B., E.O., S.H.), Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Victoria; Emergency Department (D.H.), Queensland Children's Hospital; University of Queensland (D.H.); Mater Research Institute (D.H.), Brisbane, Queensland; Emergency Department (M.L.B.), Perth Children's Hospital; Divisions of Emergency Medicine and Paediatrics (M.L.B.), University of Western Australia, Perth; Emergency Department (A.K.), Women's and Children's Hospital, Adelaide; Emergency Department (B.L.), Logan Hospital, Brisbane, Queensland; Emergency Department (J.H.), The Children's Hospital at Westmead, Sydney; Emergency Department (A. West, J.A.C.), Monash Medical Centre, Clayton, Victoria; Department of Emergency Medicine (S.G.), Gold Coast University Hospital, Southport; School of Medicine and Menzies Health Institute Queensland (S.G.), Griffith University, Southport; Child Health Research Centre (S.G.), The University of Queensland, South Brisbane; Emergency Department (M.Z.), John Hunter Hospital, Newcastle, New South Wales; Emergency Department (K.V.), Townsville Hospital; James Cook University College of Medicine and Dentistry (K.V.), Townsville, Australia; University of St Andrews (F.S.), School of Medicine, Edinburgh, United Kingdom; North York General Hospital (F.S.), Department of Family & Community Medicine and Dalla Lana School of Public Health, University of Toronto, Ontario, Canada; Department of Anaesthesia (A.D.), Royal Children's Hospital; Department of Otolaryngology (R.G.B.), Pharmacy Department (D.L.), and Department of Neurology (M.T.M.), Royal Children's Hospital; Clinical Epidemiology and Biostatistics Unit (K.J.L.) and Melbourne Children's Trial Centre (A.D., K.J.L.), Murdoch Children's Research Institute, Parkville, Victoria, Australia; Children's Emergency Department (S.R.D.), Starship Children's Hospital, Auckland; and Departments of Surgery and Paediatrics: Child and Youth Health (S.R.D.), University of Auckland, New Zealand
| | - Ed Oakley
- From the Emergency Department (F.E.B., E.O., S.M.H., J.A.C., A. Williams, H.E.), Royal Children's Hospital; Clinical Sciences (F.E.B., E.O., A.D., S.M.H., J.A.C., R.G.B., S.H., C.L.W., A. Williams, H.E., M.T.M.), Murdoch Children's Research Institute, Parkville; Departments of Paediatrics (F.E.B., E.O., A.D., S.M.H., R.G.B., M.T.M., K.J.L.) and Critical Care (F.E.B., E.O., S.H.), Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Victoria; Emergency Department (D.H.), Queensland Children's Hospital; University of Queensland (D.H.); Mater Research Institute (D.H.), Brisbane, Queensland; Emergency Department (M.L.B.), Perth Children's Hospital; Divisions of Emergency Medicine and Paediatrics (M.L.B.), University of Western Australia, Perth; Emergency Department (A.K.), Women's and Children's Hospital, Adelaide; Emergency Department (B.L.), Logan Hospital, Brisbane, Queensland; Emergency Department (J.H.), The Children's Hospital at Westmead, Sydney; Emergency Department (A. West, J.A.C.), Monash Medical Centre, Clayton, Victoria; Department of Emergency Medicine (S.G.), Gold Coast University Hospital, Southport; School of Medicine and Menzies Health Institute Queensland (S.G.), Griffith University, Southport; Child Health Research Centre (S.G.), The University of Queensland, South Brisbane; Emergency Department (M.Z.), John Hunter Hospital, Newcastle, New South Wales; Emergency Department (K.V.), Townsville Hospital; James Cook University College of Medicine and Dentistry (K.V.), Townsville, Australia; University of St Andrews (F.S.), School of Medicine, Edinburgh, United Kingdom; North York General Hospital (F.S.), Department of Family & Community Medicine and Dalla Lana School of Public Health, University of Toronto, Ontario, Canada; Department of Anaesthesia (A.D.), Royal Children's Hospital; Department of Otolaryngology (R.G.B.), Pharmacy Department (D.L.), and Department of Neurology (M.T.M.), Royal Children's Hospital; Clinical Epidemiology and Biostatistics Unit (K.J.L.) and Melbourne Children's Trial Centre (A.D., K.J.L.), Murdoch Children's Research Institute, Parkville, Victoria, Australia; Children's Emergency Department (S.R.D.), Starship Children's Hospital, Auckland; and Departments of Surgery and Paediatrics: Child and Youth Health (S.R.D.), University of Auckland, New Zealand
| | - Andrew Davidson
- From the Emergency Department (F.E.B., E.O., S.M.H., J.A.C., A. Williams, H.E.), Royal Children's Hospital; Clinical Sciences (F.E.B., E.O., A.D., S.M.H., J.A.C., R.G.B., S.H., C.L.W., A. Williams, H.E., M.T.M.), Murdoch Children's Research Institute, Parkville; Departments of Paediatrics (F.E.B., E.O., A.D., S.M.H., R.G.B., M.T.M., K.J.L.) and Critical Care (F.E.B., E.O., S.H.), Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Victoria; Emergency Department (D.H.), Queensland Children's Hospital; University of Queensland (D.H.); Mater Research Institute (D.H.), Brisbane, Queensland; Emergency Department (M.L.B.), Perth Children's Hospital; Divisions of Emergency Medicine and Paediatrics (M.L.B.), University of Western Australia, Perth; Emergency Department (A.K.), Women's and Children's Hospital, Adelaide; Emergency Department (B.L.), Logan Hospital, Brisbane, Queensland; Emergency Department (J.H.), The Children's Hospital at Westmead, Sydney; Emergency Department (A. West, J.A.C.), Monash Medical Centre, Clayton, Victoria; Department of Emergency Medicine (S.G.), Gold Coast University Hospital, Southport; School of Medicine and Menzies Health Institute Queensland (S.G.), Griffith University, Southport; Child Health Research Centre (S.G.), The University of Queensland, South Brisbane; Emergency Department (M.Z.), John Hunter Hospital, Newcastle, New South Wales; Emergency Department (K.V.), Townsville Hospital; James Cook University College of Medicine and Dentistry (K.V.), Townsville, Australia; University of St Andrews (F.S.), School of Medicine, Edinburgh, United Kingdom; North York General Hospital (F.S.), Department of Family & Community Medicine and Dalla Lana School of Public Health, University of Toronto, Ontario, Canada; Department of Anaesthesia (A.D.), Royal Children's Hospital; Department of Otolaryngology (R.G.B.), Pharmacy Department (D.L.), and Department of Neurology (M.T.M.), Royal Children's Hospital; Clinical Epidemiology and Biostatistics Unit (K.J.L.) and Melbourne Children's Trial Centre (A.D., K.J.L.), Murdoch Children's Research Institute, Parkville, Victoria, Australia; Children's Emergency Department (S.R.D.), Starship Children's Hospital, Auckland; and Departments of Surgery and Paediatrics: Child and Youth Health (S.R.D.), University of Auckland, New Zealand
| | - Sandy M Hopper
- From the Emergency Department (F.E.B., E.O., S.M.H., J.A.C., A. Williams, H.E.), Royal Children's Hospital; Clinical Sciences (F.E.B., E.O., A.D., S.M.H., J.A.C., R.G.B., S.H., C.L.W., A. Williams, H.E., M.T.M.), Murdoch Children's Research Institute, Parkville; Departments of Paediatrics (F.E.B., E.O., A.D., S.M.H., R.G.B., M.T.M., K.J.L.) and Critical Care (F.E.B., E.O., S.H.), Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Victoria; Emergency Department (D.H.), Queensland Children's Hospital; University of Queensland (D.H.); Mater Research Institute (D.H.), Brisbane, Queensland; Emergency Department (M.L.B.), Perth Children's Hospital; Divisions of Emergency Medicine and Paediatrics (M.L.B.), University of Western Australia, Perth; Emergency Department (A.K.), Women's and Children's Hospital, Adelaide; Emergency Department (B.L.), Logan Hospital, Brisbane, Queensland; Emergency Department (J.H.), The Children's Hospital at Westmead, Sydney; Emergency Department (A. West, J.A.C.), Monash Medical Centre, Clayton, Victoria; Department of Emergency Medicine (S.G.), Gold Coast University Hospital, Southport; School of Medicine and Menzies Health Institute Queensland (S.G.), Griffith University, Southport; Child Health Research Centre (S.G.), The University of Queensland, South Brisbane; Emergency Department (M.Z.), John Hunter Hospital, Newcastle, New South Wales; Emergency Department (K.V.), Townsville Hospital; James Cook University College of Medicine and Dentistry (K.V.), Townsville, Australia; University of St Andrews (F.S.), School of Medicine, Edinburgh, United Kingdom; North York General Hospital (F.S.), Department of Family & Community Medicine and Dalla Lana School of Public Health, University of Toronto, Ontario, Canada; Department of Anaesthesia (A.D.), Royal Children's Hospital; Department of Otolaryngology (R.G.B.), Pharmacy Department (D.L.), and Department of Neurology (M.T.M.), Royal Children's Hospital; Clinical Epidemiology and Biostatistics Unit (K.J.L.) and Melbourne Children's Trial Centre (A.D., K.J.L.), Murdoch Children's Research Institute, Parkville, Victoria, Australia; Children's Emergency Department (S.R.D.), Starship Children's Hospital, Auckland; and Departments of Surgery and Paediatrics: Child and Youth Health (S.R.D.), University of Auckland, New Zealand
| | - John A Cheek
- From the Emergency Department (F.E.B., E.O., S.M.H., J.A.C., A. Williams, H.E.), Royal Children's Hospital; Clinical Sciences (F.E.B., E.O., A.D., S.M.H., J.A.C., R.G.B., S.H., C.L.W., A. Williams, H.E., M.T.M.), Murdoch Children's Research Institute, Parkville; Departments of Paediatrics (F.E.B., E.O., A.D., S.M.H., R.G.B., M.T.M., K.J.L.) and Critical Care (F.E.B., E.O., S.H.), Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Victoria; Emergency Department (D.H.), Queensland Children's Hospital; University of Queensland (D.H.); Mater Research Institute (D.H.), Brisbane, Queensland; Emergency Department (M.L.B.), Perth Children's Hospital; Divisions of Emergency Medicine and Paediatrics (M.L.B.), University of Western Australia, Perth; Emergency Department (A.K.), Women's and Children's Hospital, Adelaide; Emergency Department (B.L.), Logan Hospital, Brisbane, Queensland; Emergency Department (J.H.), The Children's Hospital at Westmead, Sydney; Emergency Department (A. West, J.A.C.), Monash Medical Centre, Clayton, Victoria; Department of Emergency Medicine (S.G.), Gold Coast University Hospital, Southport; School of Medicine and Menzies Health Institute Queensland (S.G.), Griffith University, Southport; Child Health Research Centre (S.G.), The University of Queensland, South Brisbane; Emergency Department (M.Z.), John Hunter Hospital, Newcastle, New South Wales; Emergency Department (K.V.), Townsville Hospital; James Cook University College of Medicine and Dentistry (K.V.), Townsville, Australia; University of St Andrews (F.S.), School of Medicine, Edinburgh, United Kingdom; North York General Hospital (F.S.), Department of Family & Community Medicine and Dalla Lana School of Public Health, University of Toronto, Ontario, Canada; Department of Anaesthesia (A.D.), Royal Children's Hospital; Department of Otolaryngology (R.G.B.), Pharmacy Department (D.L.), and Department of Neurology (M.T.M.), Royal Children's Hospital; Clinical Epidemiology and Biostatistics Unit (K.J.L.) and Melbourne Children's Trial Centre (A.D., K.J.L.), Murdoch Children's Research Institute, Parkville, Victoria, Australia; Children's Emergency Department (S.R.D.), Starship Children's Hospital, Auckland; and Departments of Surgery and Paediatrics: Child and Youth Health (S.R.D.), University of Auckland, New Zealand
| | - Robert G Berkowitz
- From the Emergency Department (F.E.B., E.O., S.M.H., J.A.C., A. Williams, H.E.), Royal Children's Hospital; Clinical Sciences (F.E.B., E.O., A.D., S.M.H., J.A.C., R.G.B., S.H., C.L.W., A. Williams, H.E., M.T.M.), Murdoch Children's Research Institute, Parkville; Departments of Paediatrics (F.E.B., E.O., A.D., S.M.H., R.G.B., M.T.M., K.J.L.) and Critical Care (F.E.B., E.O., S.H.), Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Victoria; Emergency Department (D.H.), Queensland Children's Hospital; University of Queensland (D.H.); Mater Research Institute (D.H.), Brisbane, Queensland; Emergency Department (M.L.B.), Perth Children's Hospital; Divisions of Emergency Medicine and Paediatrics (M.L.B.), University of Western Australia, Perth; Emergency Department (A.K.), Women's and Children's Hospital, Adelaide; Emergency Department (B.L.), Logan Hospital, Brisbane, Queensland; Emergency Department (J.H.), The Children's Hospital at Westmead, Sydney; Emergency Department (A. West, J.A.C.), Monash Medical Centre, Clayton, Victoria; Department of Emergency Medicine (S.G.), Gold Coast University Hospital, Southport; School of Medicine and Menzies Health Institute Queensland (S.G.), Griffith University, Southport; Child Health Research Centre (S.G.), The University of Queensland, South Brisbane; Emergency Department (M.Z.), John Hunter Hospital, Newcastle, New South Wales; Emergency Department (K.V.), Townsville Hospital; James Cook University College of Medicine and Dentistry (K.V.), Townsville, Australia; University of St Andrews (F.S.), School of Medicine, Edinburgh, United Kingdom; North York General Hospital (F.S.), Department of Family & Community Medicine and Dalla Lana School of Public Health, University of Toronto, Ontario, Canada; Department of Anaesthesia (A.D.), Royal Children's Hospital; Department of Otolaryngology (R.G.B.), Pharmacy Department (D.L.), and Department of Neurology (M.T.M.), Royal Children's Hospital; Clinical Epidemiology and Biostatistics Unit (K.J.L.) and Melbourne Children's Trial Centre (A.D., K.J.L.), Murdoch Children's Research Institute, Parkville, Victoria, Australia; Children's Emergency Department (S.R.D.), Starship Children's Hospital, Auckland; and Departments of Surgery and Paediatrics: Child and Youth Health (S.R.D.), University of Auckland, New Zealand
| | - Stephen Hearps
- From the Emergency Department (F.E.B., E.O., S.M.H., J.A.C., A. Williams, H.E.), Royal Children's Hospital; Clinical Sciences (F.E.B., E.O., A.D., S.M.H., J.A.C., R.G.B., S.H., C.L.W., A. Williams, H.E., M.T.M.), Murdoch Children's Research Institute, Parkville; Departments of Paediatrics (F.E.B., E.O., A.D., S.M.H., R.G.B., M.T.M., K.J.L.) and Critical Care (F.E.B., E.O., S.H.), Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Victoria; Emergency Department (D.H.), Queensland Children's Hospital; University of Queensland (D.H.); Mater Research Institute (D.H.), Brisbane, Queensland; Emergency Department (M.L.B.), Perth Children's Hospital; Divisions of Emergency Medicine and Paediatrics (M.L.B.), University of Western Australia, Perth; Emergency Department (A.K.), Women's and Children's Hospital, Adelaide; Emergency Department (B.L.), Logan Hospital, Brisbane, Queensland; Emergency Department (J.H.), The Children's Hospital at Westmead, Sydney; Emergency Department (A. West, J.A.C.), Monash Medical Centre, Clayton, Victoria; Department of Emergency Medicine (S.G.), Gold Coast University Hospital, Southport; School of Medicine and Menzies Health Institute Queensland (S.G.), Griffith University, Southport; Child Health Research Centre (S.G.), The University of Queensland, South Brisbane; Emergency Department (M.Z.), John Hunter Hospital, Newcastle, New South Wales; Emergency Department (K.V.), Townsville Hospital; James Cook University College of Medicine and Dentistry (K.V.), Townsville, Australia; University of St Andrews (F.S.), School of Medicine, Edinburgh, United Kingdom; North York General Hospital (F.S.), Department of Family & Community Medicine and Dalla Lana School of Public Health, University of Toronto, Ontario, Canada; Department of Anaesthesia (A.D.), Royal Children's Hospital; Department of Otolaryngology (R.G.B.), Pharmacy Department (D.L.), and Department of Neurology (M.T.M.), Royal Children's Hospital; Clinical Epidemiology and Biostatistics Unit (K.J.L.) and Melbourne Children's Trial Centre (A.D., K.J.L.), Murdoch Children's Research Institute, Parkville, Victoria, Australia; Children's Emergency Department (S.R.D.), Starship Children's Hospital, Auckland; and Departments of Surgery and Paediatrics: Child and Youth Health (S.R.D.), University of Auckland, New Zealand
| | - Catherine L Wilson
- From the Emergency Department (F.E.B., E.O., S.M.H., J.A.C., A. Williams, H.E.), Royal Children's Hospital; Clinical Sciences (F.E.B., E.O., A.D., S.M.H., J.A.C., R.G.B., S.H., C.L.W., A. Williams, H.E., M.T.M.), Murdoch Children's Research Institute, Parkville; Departments of Paediatrics (F.E.B., E.O., A.D., S.M.H., R.G.B., M.T.M., K.J.L.) and Critical Care (F.E.B., E.O., S.H.), Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Victoria; Emergency Department (D.H.), Queensland Children's Hospital; University of Queensland (D.H.); Mater Research Institute (D.H.), Brisbane, Queensland; Emergency Department (M.L.B.), Perth Children's Hospital; Divisions of Emergency Medicine and Paediatrics (M.L.B.), University of Western Australia, Perth; Emergency Department (A.K.), Women's and Children's Hospital, Adelaide; Emergency Department (B.L.), Logan Hospital, Brisbane, Queensland; Emergency Department (J.H.), The Children's Hospital at Westmead, Sydney; Emergency Department (A. West, J.A.C.), Monash Medical Centre, Clayton, Victoria; Department of Emergency Medicine (S.G.), Gold Coast University Hospital, Southport; School of Medicine and Menzies Health Institute Queensland (S.G.), Griffith University, Southport; Child Health Research Centre (S.G.), The University of Queensland, South Brisbane; Emergency Department (M.Z.), John Hunter Hospital, Newcastle, New South Wales; Emergency Department (K.V.), Townsville Hospital; James Cook University College of Medicine and Dentistry (K.V.), Townsville, Australia; University of St Andrews (F.S.), School of Medicine, Edinburgh, United Kingdom; North York General Hospital (F.S.), Department of Family & Community Medicine and Dalla Lana School of Public Health, University of Toronto, Ontario, Canada; Department of Anaesthesia (A.D.), Royal Children's Hospital; Department of Otolaryngology (R.G.B.), Pharmacy Department (D.L.), and Department of Neurology (M.T.M.), Royal Children's Hospital; Clinical Epidemiology and Biostatistics Unit (K.J.L.) and Melbourne Children's Trial Centre (A.D., K.J.L.), Murdoch Children's Research Institute, Parkville, Victoria, Australia; Children's Emergency Department (S.R.D.), Starship Children's Hospital, Auckland; and Departments of Surgery and Paediatrics: Child and Youth Health (S.R.D.), University of Auckland, New Zealand
| | - Amanda Williams
- From the Emergency Department (F.E.B., E.O., S.M.H., J.A.C., A. Williams, H.E.), Royal Children's Hospital; Clinical Sciences (F.E.B., E.O., A.D., S.M.H., J.A.C., R.G.B., S.H., C.L.W., A. Williams, H.E., M.T.M.), Murdoch Children's Research Institute, Parkville; Departments of Paediatrics (F.E.B., E.O., A.D., S.M.H., R.G.B., M.T.M., K.J.L.) and Critical Care (F.E.B., E.O., S.H.), Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Victoria; Emergency Department (D.H.), Queensland Children's Hospital; University of Queensland (D.H.); Mater Research Institute (D.H.), Brisbane, Queensland; Emergency Department (M.L.B.), Perth Children's Hospital; Divisions of Emergency Medicine and Paediatrics (M.L.B.), University of Western Australia, Perth; Emergency Department (A.K.), Women's and Children's Hospital, Adelaide; Emergency Department (B.L.), Logan Hospital, Brisbane, Queensland; Emergency Department (J.H.), The Children's Hospital at Westmead, Sydney; Emergency Department (A. West, J.A.C.), Monash Medical Centre, Clayton, Victoria; Department of Emergency Medicine (S.G.), Gold Coast University Hospital, Southport; School of Medicine and Menzies Health Institute Queensland (S.G.), Griffith University, Southport; Child Health Research Centre (S.G.), The University of Queensland, South Brisbane; Emergency Department (M.Z.), John Hunter Hospital, Newcastle, New South Wales; Emergency Department (K.V.), Townsville Hospital; James Cook University College of Medicine and Dentistry (K.V.), Townsville, Australia; University of St Andrews (F.S.), School of Medicine, Edinburgh, United Kingdom; North York General Hospital (F.S.), Department of Family & Community Medicine and Dalla Lana School of Public Health, University of Toronto, Ontario, Canada; Department of Anaesthesia (A.D.), Royal Children's Hospital; Department of Otolaryngology (R.G.B.), Pharmacy Department (D.L.), and Department of Neurology (M.T.M.), Royal Children's Hospital; Clinical Epidemiology and Biostatistics Unit (K.J.L.) and Melbourne Children's Trial Centre (A.D., K.J.L.), Murdoch Children's Research Institute, Parkville, Victoria, Australia; Children's Emergency Department (S.R.D.), Starship Children's Hospital, Auckland; and Departments of Surgery and Paediatrics: Child and Youth Health (S.R.D.), University of Auckland, New Zealand
| | - Hannah Elborough
- From the Emergency Department (F.E.B., E.O., S.M.H., J.A.C., A. Williams, H.E.), Royal Children's Hospital; Clinical Sciences (F.E.B., E.O., A.D., S.M.H., J.A.C., R.G.B., S.H., C.L.W., A. Williams, H.E., M.T.M.), Murdoch Children's Research Institute, Parkville; Departments of Paediatrics (F.E.B., E.O., A.D., S.M.H., R.G.B., M.T.M., K.J.L.) and Critical Care (F.E.B., E.O., S.H.), Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Victoria; Emergency Department (D.H.), Queensland Children's Hospital; University of Queensland (D.H.); Mater Research Institute (D.H.), Brisbane, Queensland; Emergency Department (M.L.B.), Perth Children's Hospital; Divisions of Emergency Medicine and Paediatrics (M.L.B.), University of Western Australia, Perth; Emergency Department (A.K.), Women's and Children's Hospital, Adelaide; Emergency Department (B.L.), Logan Hospital, Brisbane, Queensland; Emergency Department (J.H.), The Children's Hospital at Westmead, Sydney; Emergency Department (A. West, J.A.C.), Monash Medical Centre, Clayton, Victoria; Department of Emergency Medicine (S.G.), Gold Coast University Hospital, Southport; School of Medicine and Menzies Health Institute Queensland (S.G.), Griffith University, Southport; Child Health Research Centre (S.G.), The University of Queensland, South Brisbane; Emergency Department (M.Z.), John Hunter Hospital, Newcastle, New South Wales; Emergency Department (K.V.), Townsville Hospital; James Cook University College of Medicine and Dentistry (K.V.), Townsville, Australia; University of St Andrews (F.S.), School of Medicine, Edinburgh, United Kingdom; North York General Hospital (F.S.), Department of Family & Community Medicine and Dalla Lana School of Public Health, University of Toronto, Ontario, Canada; Department of Anaesthesia (A.D.), Royal Children's Hospital; Department of Otolaryngology (R.G.B.), Pharmacy Department (D.L.), and Department of Neurology (M.T.M.), Royal Children's Hospital; Clinical Epidemiology and Biostatistics Unit (K.J.L.) and Melbourne Children's Trial Centre (A.D., K.J.L.), Murdoch Children's Research Institute, Parkville, Victoria, Australia; Children's Emergency Department (S.R.D.), Starship Children's Hospital, Auckland; and Departments of Surgery and Paediatrics: Child and Youth Health (S.R.D.), University of Auckland, New Zealand
| | - Donna Legge
- From the Emergency Department (F.E.B., E.O., S.M.H., J.A.C., A. Williams, H.E.), Royal Children's Hospital; Clinical Sciences (F.E.B., E.O., A.D., S.M.H., J.A.C., R.G.B., S.H., C.L.W., A. Williams, H.E., M.T.M.), Murdoch Children's Research Institute, Parkville; Departments of Paediatrics (F.E.B., E.O., A.D., S.M.H., R.G.B., M.T.M., K.J.L.) and Critical Care (F.E.B., E.O., S.H.), Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Victoria; Emergency Department (D.H.), Queensland Children's Hospital; University of Queensland (D.H.); Mater Research Institute (D.H.), Brisbane, Queensland; Emergency Department (M.L.B.), Perth Children's Hospital; Divisions of Emergency Medicine and Paediatrics (M.L.B.), University of Western Australia, Perth; Emergency Department (A.K.), Women's and Children's Hospital, Adelaide; Emergency Department (B.L.), Logan Hospital, Brisbane, Queensland; Emergency Department (J.H.), The Children's Hospital at Westmead, Sydney; Emergency Department (A. West, J.A.C.), Monash Medical Centre, Clayton, Victoria; Department of Emergency Medicine (S.G.), Gold Coast University Hospital, Southport; School of Medicine and Menzies Health Institute Queensland (S.G.), Griffith University, Southport; Child Health Research Centre (S.G.), The University of Queensland, South Brisbane; Emergency Department (M.Z.), John Hunter Hospital, Newcastle, New South Wales; Emergency Department (K.V.), Townsville Hospital; James Cook University College of Medicine and Dentistry (K.V.), Townsville, Australia; University of St Andrews (F.S.), School of Medicine, Edinburgh, United Kingdom; North York General Hospital (F.S.), Department of Family & Community Medicine and Dalla Lana School of Public Health, University of Toronto, Ontario, Canada; Department of Anaesthesia (A.D.), Royal Children's Hospital; Department of Otolaryngology (R.G.B.), Pharmacy Department (D.L.), and Department of Neurology (M.T.M.), Royal Children's Hospital; Clinical Epidemiology and Biostatistics Unit (K.J.L.) and Melbourne Children's Trial Centre (A.D., K.J.L.), Murdoch Children's Research Institute, Parkville, Victoria, Australia; Children's Emergency Department (S.R.D.), Starship Children's Hospital, Auckland; and Departments of Surgery and Paediatrics: Child and Youth Health (S.R.D.), University of Auckland, New Zealand
| | - Mark T Mackay
- From the Emergency Department (F.E.B., E.O., S.M.H., J.A.C., A. Williams, H.E.), Royal Children's Hospital; Clinical Sciences (F.E.B., E.O., A.D., S.M.H., J.A.C., R.G.B., S.H., C.L.W., A. Williams, H.E., M.T.M.), Murdoch Children's Research Institute, Parkville; Departments of Paediatrics (F.E.B., E.O., A.D., S.M.H., R.G.B., M.T.M., K.J.L.) and Critical Care (F.E.B., E.O., S.H.), Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Victoria; Emergency Department (D.H.), Queensland Children's Hospital; University of Queensland (D.H.); Mater Research Institute (D.H.), Brisbane, Queensland; Emergency Department (M.L.B.), Perth Children's Hospital; Divisions of Emergency Medicine and Paediatrics (M.L.B.), University of Western Australia, Perth; Emergency Department (A.K.), Women's and Children's Hospital, Adelaide; Emergency Department (B.L.), Logan Hospital, Brisbane, Queensland; Emergency Department (J.H.), The Children's Hospital at Westmead, Sydney; Emergency Department (A. West, J.A.C.), Monash Medical Centre, Clayton, Victoria; Department of Emergency Medicine (S.G.), Gold Coast University Hospital, Southport; School of Medicine and Menzies Health Institute Queensland (S.G.), Griffith University, Southport; Child Health Research Centre (S.G.), The University of Queensland, South Brisbane; Emergency Department (M.Z.), John Hunter Hospital, Newcastle, New South Wales; Emergency Department (K.V.), Townsville Hospital; James Cook University College of Medicine and Dentistry (K.V.), Townsville, Australia; University of St Andrews (F.S.), School of Medicine, Edinburgh, United Kingdom; North York General Hospital (F.S.), Department of Family & Community Medicine and Dalla Lana School of Public Health, University of Toronto, Ontario, Canada; Department of Anaesthesia (A.D.), Royal Children's Hospital; Department of Otolaryngology (R.G.B.), Pharmacy Department (D.L.), and Department of Neurology (M.T.M.), Royal Children's Hospital; Clinical Epidemiology and Biostatistics Unit (K.J.L.) and Melbourne Children's Trial Centre (A.D., K.J.L.), Murdoch Children's Research Institute, Parkville, Victoria, Australia; Children's Emergency Department (S.R.D.), Starship Children's Hospital, Auckland; and Departments of Surgery and Paediatrics: Child and Youth Health (S.R.D.), University of Auckland, New Zealand
| | - Katherine J Lee
- From the Emergency Department (F.E.B., E.O., S.M.H., J.A.C., A. Williams, H.E.), Royal Children's Hospital; Clinical Sciences (F.E.B., E.O., A.D., S.M.H., J.A.C., R.G.B., S.H., C.L.W., A. Williams, H.E., M.T.M.), Murdoch Children's Research Institute, Parkville; Departments of Paediatrics (F.E.B., E.O., A.D., S.M.H., R.G.B., M.T.M., K.J.L.) and Critical Care (F.E.B., E.O., S.H.), Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Victoria; Emergency Department (D.H.), Queensland Children's Hospital; University of Queensland (D.H.); Mater Research Institute (D.H.), Brisbane, Queensland; Emergency Department (M.L.B.), Perth Children's Hospital; Divisions of Emergency Medicine and Paediatrics (M.L.B.), University of Western Australia, Perth; Emergency Department (A.K.), Women's and Children's Hospital, Adelaide; Emergency Department (B.L.), Logan Hospital, Brisbane, Queensland; Emergency Department (J.H.), The Children's Hospital at Westmead, Sydney; Emergency Department (A. West, J.A.C.), Monash Medical Centre, Clayton, Victoria; Department of Emergency Medicine (S.G.), Gold Coast University Hospital, Southport; School of Medicine and Menzies Health Institute Queensland (S.G.), Griffith University, Southport; Child Health Research Centre (S.G.), The University of Queensland, South Brisbane; Emergency Department (M.Z.), John Hunter Hospital, Newcastle, New South Wales; Emergency Department (K.V.), Townsville Hospital; James Cook University College of Medicine and Dentistry (K.V.), Townsville, Australia; University of St Andrews (F.S.), School of Medicine, Edinburgh, United Kingdom; North York General Hospital (F.S.), Department of Family & Community Medicine and Dalla Lana School of Public Health, University of Toronto, Ontario, Canada; Department of Anaesthesia (A.D.), Royal Children's Hospital; Department of Otolaryngology (R.G.B.), Pharmacy Department (D.L.), and Department of Neurology (M.T.M.), Royal Children's Hospital; Clinical Epidemiology and Biostatistics Unit (K.J.L.) and Melbourne Children's Trial Centre (A.D., K.J.L.), Murdoch Children's Research Institute, Parkville, Victoria, Australia; Children's Emergency Department (S.R.D.), Starship Children's Hospital, Auckland; and Departments of Surgery and Paediatrics: Child and Youth Health (S.R.D.), University of Auckland, New Zealand
| | - Stuart R Dalziel
- From the Emergency Department (F.E.B., E.O., S.M.H., J.A.C., A. Williams, H.E.), Royal Children's Hospital; Clinical Sciences (F.E.B., E.O., A.D., S.M.H., J.A.C., R.G.B., S.H., C.L.W., A. Williams, H.E., M.T.M.), Murdoch Children's Research Institute, Parkville; Departments of Paediatrics (F.E.B., E.O., A.D., S.M.H., R.G.B., M.T.M., K.J.L.) and Critical Care (F.E.B., E.O., S.H.), Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Victoria; Emergency Department (D.H.), Queensland Children's Hospital; University of Queensland (D.H.); Mater Research Institute (D.H.), Brisbane, Queensland; Emergency Department (M.L.B.), Perth Children's Hospital; Divisions of Emergency Medicine and Paediatrics (M.L.B.), University of Western Australia, Perth; Emergency Department (A.K.), Women's and Children's Hospital, Adelaide; Emergency Department (B.L.), Logan Hospital, Brisbane, Queensland; Emergency Department (J.H.), The Children's Hospital at Westmead, Sydney; Emergency Department (A. West, J.A.C.), Monash Medical Centre, Clayton, Victoria; Department of Emergency Medicine (S.G.), Gold Coast University Hospital, Southport; School of Medicine and Menzies Health Institute Queensland (S.G.), Griffith University, Southport; Child Health Research Centre (S.G.), The University of Queensland, South Brisbane; Emergency Department (M.Z.), John Hunter Hospital, Newcastle, New South Wales; Emergency Department (K.V.), Townsville Hospital; James Cook University College of Medicine and Dentistry (K.V.), Townsville, Australia; University of St Andrews (F.S.), School of Medicine, Edinburgh, United Kingdom; North York General Hospital (F.S.), Department of Family & Community Medicine and Dalla Lana School of Public Health, University of Toronto, Ontario, Canada; Department of Anaesthesia (A.D.), Royal Children's Hospital; Department of Otolaryngology (R.G.B.), Pharmacy Department (D.L.), and Department of Neurology (M.T.M.), Royal Children's Hospital; Clinical Epidemiology and Biostatistics Unit (K.J.L.) and Melbourne Children's Trial Centre (A.D., K.J.L.), Murdoch Children's Research Institute, Parkville, Victoria, Australia; Children's Emergency Department (S.R.D.), Starship Children's Hospital, Auckland; and Departments of Surgery and Paediatrics: Child and Youth Health (S.R.D.), University of Auckland, New Zealand
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