1 1 Palliative and Supportive Services, Flinders University, Bedford Park, SA, Australia.
2 2 Deakin Health Economics, Deakin University, Burwood, VIC, Australia.
3 3 Hematology, Oncology and Palliative Care, Virginia Commonwealth University, Richmond, VA, USA.
4 4 School of Social and Community Medicine, University of Bristol, Bristol, UK.
5 5 The National Institute for Health Research Collaboration for Leadership in Applied Health Research and Care West (NIHR CLAHRC West), University Hospitals Bristol NHS Foundation Trust, Bristol, UK.