1. Senior Research Fellow, Drug Policy Modelling Program, National Drug and Alcohol Research Centre, The University of New South Wales, Sydney NSW 2052 Australia..
2. Visiting Professorial Fellow, Faculty of Law, The University of New South Wales, Sydney NSW 2052 Australia..
3. Director, Drug Policy Modelling Program, National Drug and Alcohol Research Centre, The University of New South Wales, Sydney NSW 2052 Australia..