1. School of Psychology, University of Sydney, Sydney, NSW, Australia
2. Discipline of Addiction Medicine, Central Clinical School, University of Sydney, NSW Australia
3. The Langton Centre, Drug and Alcohol Services, South Eastern Sydney Local Health District, Surry Hills, NSW, Australia
4. Woolcock Institute of Medical Research &University of Sydney, NSW, Australia
5. University Centre for Rural Health, University of Sydney, Lismore, NSW, Australia
6. Riverlands Drug and Alcohol Centre, Lismore, NSW, Australia
7. Institute of Psychiatry, Kings College, London, UK