1. Discipline of Speech Pathology, School of Health Sciences, The University of Sydney, Camperdown, Australia
2. Speech Pathology Department, Concord Repatriation General Hospital, Concord, Australia
3. School of Health & Rehabilitation Sciences, The University of Queensland, St Lucia, Queensland, Australia
4. Graduate School of Health, University of Technology Sydney, Ultimo, Australia
5. Speech Pathology & Critical Care Departments, Royal Prince Alfred Hospital, Sydney, Australia
6. Critical Care Division, The George Institute for Global Health, UNSW Sydney, Sydney, Australia
7. Australian and New Zealand Intensive Care Research Centre (ANZIC-RC), School of Public Health and Preventive Medicine, Monash University, Melbourne, Australia, and
8. Speech Science, School of Psychology, The University of Auckland, Auckland, New Zealand