1. The University of Western Australia Medical School, Perth, Western Australia, Australia
2. Institute for Respiratory Health, Perth, Western Australia, Australia
3. Cystic Fibrosis Western Australia, Perth, Western Australia, Australia
4. Division of Child and Adolescent Psychiatry, Massachusetts General Hospital, Boston, Massachusetts, USA
5. Joe DiMaggio Cystic Fibrosis, Pulmonary and Sleep Center, Hollywood, Florida, USA
6. Division of Child and Adolescent Psychiatry, State University of New York at Buffalo, Buffalo, New York, USA
7. Department of Respiratory and Sleep Medicine, Queensland Children's Hospital, South Brisbane, Queensland, Australia
8. Faculty of Medicine, Clinical Unit, The University of Queensland, Brisbane, Queensland, Australia