1. Discipline of Addiction Medicine, National Health and Medical Research Council (NHMRC) Centre for Excellence in Mental Health and Substance Use, The University of Sydney, New South Wales, Australia
2. Faculty of Health Sciences, National Health and Medical Research Council (NHMRC) Centre for Excellence in Mental Health and Substance Use, The University of Sydney, New South Wales, Australia
3. National Drug and Alcohol Research Centre, National Health and Medical Research Council (NHMRC) Centre for Excellence in Mental Health and Substance Use, University of New South Wales (UNSW), Australia
4. School of Medicine and Public Health University of Newcastle, New South Wales, Australia
5. Drug Health Services, Royal Prince Alfred Hospital, Camperdown, New South Wales, Australia