title: In reply.
authors.affiliation: Murdoch Children's Research Institute and the Emergency Department, Royal Children's Hospital Melbourne, Melbourne, Victoria, Australia; Department of Pediatrics, Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Melbourne, Victoria, Australia.
authors.forename: Franz E
authors.initials: FE
authors.lastname: Babl
authors.affiliation: Murdoch Children's Research Institute and the Emergency Department, Royal Children's Hospital Melbourne, Melbourne, Victoria, Australia; Department of Pediatrics, Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Melbourne, Victoria, Australia.
authors.forename: Joanne
authors.initials: J
authors.lastname: Grindlay
authors.affiliation: Murdoch Children's Research Institute and the Emergency Department, Royal Children's Hospital Melbourne, Melbourne, Victoria, Australia; Paediatric Emergency Research Unit, National Children's Research Centre, Dublin, Ireland.
authors.forename: Michael Joseph
authors.initials: MJ
authors.lastname: Barrett