1. Addiction CAG, South London and Maudsley NHS Trust, London, UK
2. Global Drug Survey, London, UK
3. Institute for Social Science Research, The University of Queensland, Brisbane, QLD, Australia
4. ARC Centre of Excellence for Children and Families over the Life Course, Institute for Social Science Research, The University of Queensland, Brisbane, QLD, Australia
5. TICTAC Communications Ltd, St George’s, University of London, London, UK