1. Centre for Cardiovascular and Chronic Care, Faculty of Health; University of Technology Sydney; Sydney New South Wales Australia
2. Discipline of Addiction Medicine, Central Clinical School; Sydney Medical School; Sydney New South Wales Australia
3. Drug and Alcohol Services; South East Sydney Local Health District, NSW Health; Sydney New South Wales Australia
4. School of Psychology; The University of Sydney; Sydney New South Wales Australia
5. Palliative Care; Concord Repatriation General Hospital; Sydney New South Wales Australia
6. School of Psychology; University of Wollongong; Wollongong New South Wales Australia
7. Department of Clinical Pharmacology, School of Medicine and Public Health; University of Newcastle; Newcastle New South Wales Australia
8. Palliative Care, Liverpool Cancer Therapy Centre; Liverpool Hospital; Sydney New South Wales Australia
9. Palliative and Supportive Services; Flinders University; Adelaide South Australia Australia
10. Sacred Heart Supportive and Palliative Care; St Vincent's Hospital; Sydney New South Wales Australia
11. Palliative Care, Greenwich Hospital; HammondCare; Sydney New South Wales Australia
12. Northern Clinical School, Sydney Medical School; HammondCare; Sydney New South Wales Australia
13. Department of Psychopharmacology, Faculty of Science; The University of Sydney; Sydney New South Wales Australia
14. The Ingham Institute of Applied Medical Research; Sydney New South Wales Australia
15. South Western Sydney Clinical School; University of New South Wales; Sydney New South Wales Australia