1 Journal of Cystic Fibrosis, European Cystic Fibrosis Society; QIMR Berghofer Medical Research Institute, Brisbane, Australia; Department of Thoracic medicine, The Prince Charles Hospital, Brisbane, Australia. Electronic address: scott.bell@qimrberghofer.edu.au.
2 Journal of Cystic Fibrosis, European Cystic Fibrosis Society; Cystic Fibrosis Centre, Azienda Ospedaliera Universitaria Integrata, Verona, Italy.
3 Journal of Cystic Fibrosis, European Cystic Fibrosis Society; Medical University of South Carolina, Charleston, South Carolina, USA.