title: Authors' response.
authors.affiliation: Department of Respiratory Medicine, Royal Children's Hospital, Melbourne, Australia; Murdoch Children's Research Institute, Melbourne, Australia. Electronic address: liam.welsh@rch.org.au.
authors.forename: Liam
authors.initials: L
authors.lastname: Welsh
authors.affiliation: Department of Respiratory Medicine, Royal Children's Hospital, Melbourne, Australia.
authors.forename: Christopher
authors.initials: C
authors.lastname: Nesci
authors.affiliation: Department of Respiratory Medicine, Royal Children's Hospital, Melbourne, Australia.
authors.forename: Haily
authors.initials: H
authors.lastname: Tran
authors.affiliation: Department of Respiratory Medicine, Royal Children's Hospital, Melbourne, Australia.
authors.forename: Marisol
authors.initials: M
authors.lastname: Tomai
authors.affiliation: Department of Respiratory Medicine, Royal Children's Hospital, Melbourne, Australia; Murdoch Children's Research Institute, Melbourne, Australia; Department of Paediatrics, University of Melbourne, Australia.
authors.forename: Sarath
authors.initials: S
authors.lastname: Ranganathan
mesh_terms: D003550:Cystic Fibrosis / Q000503:physiopathology* / Q000628:therapy*; D005260:Female; D006760:Hospitalization; D006801:Humans; D008297:Male; D066232:Pulmonary Elimination / Q000502:physiology*