1 Cystic Fibrosis Service, Queensland Children's Hospital, Brisbane, Queensland, Australia; Clinical Unit, School of Medicine, University of Queensland, Brisbane, Queensland, Australia. Electronic address: Tonia.Douglas@health.qld.gov.au.
2 Children's Health and Environment Program, Child Health Research Centre, University of Queensland, South Brisbane, Queensland, Australia.
3 School of Psychology, University of Queensland, Brisbane, Queensland, Australia.
4 School of Psychology, University of Queensland, Brisbane, Queensland, Australia; Child and Youth Mental Health Service, Children's Health Queensland Hospital and Health Service, Brisbane, Queensland, Australia.
6 Cystic Fibrosis Service, Queensland Children's Hospital, Brisbane, Queensland, Australia; Children's Health and Environment Program, Child Health Research Centre, University of Queensland, South Brisbane, Queensland, Australia.