1. Department of Audiology and Speech Pathology, School of Health Sciences, The University of Melbourne, Melbourne, Australia
2. Palliative Care Unit, School of Psychology and Public Health, La Trobe University, Melbourne, Australia
3. Discipline of Speech Pathology, School of Health and Human Sciences, Southern Cross University, Gold Coast, Australia, and
4. Department of Communication Sciences and Disorders, University of St. Louis, St. Louis, MI, USA