1. Department of Mental Health Services, South Eastern Sydney Local Health District, Kogarah, NSW, Australia
2. Specialty of Addiction Medicine, Faculty of Medicine and Health, University of Sydney, Sydney, NSW, Australia; Department of Drug and Alcohol Services, Northern Sydney Local Health District, St Leonards, NSW, Australia
3. Drug and Alcohol Services, Northern Sydney Local Health District, St Leonards, NSW, Australia; Specialty of Addiction Medicine, Northern Clinical School, The University of Sydney, St Leonards, NSW, Australia; National Drug and Alcohol Research Centre, University of New South Wales, Randwick, NSW, Australia