1. Australian Primary Health Care Research Institute; Australian National University; Canberra ACT Australia
2. Drug Health Service; Royal Prince Alfred Hospital; Sydney New South Wales Australia
3. Discipline of Addiction Medicine; Sydney Medical School; University of Sydney; Sydney New South Wales Australia
4. National Drug and Alcohol Research Centre; University of New South Wales; Sydney New South Wales Australia
5. Sydney Medical School; University of Sydney; Sydney New South Wales Australia
6. Sydney Local Health District; Sydney New South Wales Australia