1. Cancer and Palliative Care Research and Evaluation Unit, School of Surgery, The University of Western Australia, Perth, Western Australia, Australia.
2. WA Cancer and Palliative Care Network, WA Health, Perth, Western Australia, Australia.
3. Princess Margaret Hospital for Children, Perth, Western Australia, Australia.
4. Centre for Health Services Research, School of Population Health, The University of Western Australia, Perth, Western Australia, Australia.