Maree Teesson is Professor, NHMRC Senior Research Fellow and Assistant Director, National Drug and Alcohol Research Centre, University of New South Wales, Sydney, Australia Wayne Hall is NHMRC Australia Fellow and Professorial Fellow, The University of Queensland Centre for Clinical Research, AustraliaHeather Proudfoot is a Research Fellow at the National Drug and Alcohol Research Centre, University of New South Wales, AustraliaLouisa Degenhardt is Professor, NHMRC Senior Research Fellow and Principal for Young People’s Health at the Burnet Institute in Melbourne, Australia