1. The Matilda Centre for Research in Mental Health and Substance Use, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, Australia
2. ReachOut Australia, Pyrmont, NSW, Australia
3. Sax Institute, Haymarket, NSW, Australia
4. Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, Australia
5. School of Public Health and Community Medicine, The University of New South Wales, Sydney, NSW, Australia
6. School of Medicine and Public Health, The University of Newcastle, Newcastle, NSW, Australia