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Authors’ response
  1. Lauren Sarah Mott1,2,3,
  2. Judy Park1,
  3. Conor P Murray4,
  4. Catherine L Gangell1,
  5. Nicholas H de Klerk1,
  6. Philip J Robinson5,6,7,
  7. Colin F Robertson5,6,7,
  8. Sarath C Ranganathan5,6,7,
  9. Peter D Sly1,8,
  10. Stephen M Stick1,2,3 on behalf of AREST CF1,3,5,6
  1. 1Telethon Institute for Child Health Research and Centre for Child Health Research, Perth, Western Australia, Australia
  2. 2School of Paediatrics and Child Health, University of Western Australia, Western Australia, Perth, Australia
  3. 3Department of Respiratory Medicine, Princess Margaret Hospital for Children, Perth, Australia
  4. 4Department of Diagnostic Imaging, Princess Margaret Hospital for Children, Perth, Australia
  5. 5Department of Respiratory Medicine, Royal Children's Hospital, Melbourne, Australia
  6. 6Murdoch Children's Research Institute, Melbourne, Australia
  7. 7Department of Paediatrics, University of Melbourne, Melbourne, Australia
  8. 8Queensland Children's Medical Research Institute, University of Queensland, Brisbane, Australia
  1. Correspondence to Professor Stephen M Stick, Department of Respiratory Medicine, Princess Margaret Hospital for Children, Subiaco WA 6008, Australia; Stephen.Stick{at}

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We thank Hochhegger, Irion and Marchiorifor1 their interest in our manuscript.2 We agree that cumulative radiation dose exposures from chest computed tomography (CT) could be a limiting factor for the use of frequent scans in children with cystic fibrosis, although continuous advances in CT technology are allowing comprehensive assessments of lung structure with increasingly smaller radiation exposures.3 …

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