1. National Cannabis Prevention and Information Centre, National Drug and Alcohol Research Centre, Faculty of Medicine, University of New South Wales, Sydney, Australia2now with the School of Psychology, University of Sydney, Sydney, Australia
2. National Cannabis Prevention and Information Centre, National Drug and Alcohol Research Centre, Faculty of Medicine, University of New South Wales, Sydney, Australia
3. Drug and Alcohol Services, South Eastern Sydney Local Health District New South Wales Ministry of Health, Sydney, Australia4Addiction Medicine, Central Clinical School, Faculty of Medicine, University of Sydney, Sydney, Australia
4. Drug and Alcohol Clinical Services, Hunter New England Local Health District, New South Wales Ministry of Health, Newcastle, Australia6School of Medicine and Public Health, Faculty of Health, University of Newcastle, Newcastle, Australia
5. Drug and Alcohol Services, South Eastern Sydney Local Health District New South Wales Ministry of Health, Sydney, Australia
6. Drug and Alcohol Clinical Services, Hunter New England Local Health District, New South Wales Ministry of Health, Newcastle, Australia
7. National Cannabis Prevention and Information Centre, National Drug and Alcohol Research Centre, Faculty of Medicine, University of New South Wales, Sydney, Australia7Department of Psychology, Macquarie University, Sydney, Australia
8. School of Psychology, University of Sydney, Sydney, Australia