1. Population Health Sciences University of Bristol Bristol UK
2. National Institute of Health Research (NIHR) Health Protection Research Unit (HPRU) in Evaluation of Interventions Bristol UK
3. National Drug and Alcohol Research Centre UNSW Sydney Sydney NSW Australia
4. Centre for Youth Substance Abuse Research, Faculty of Health and Behavioural Sciences The University of Queensland Brisbane QLD Australia
5. Institute for Health Metrics and Evaluation University of Washington Seattle WA United States
6. The Kirby Institute UNSW Sydney Sydney NSW Australia
7. Division of Infectious Diseases and Global Public Health University of California San Diego CA USA
8. National Institute for Health Research Bristol Biomedical Research Centre University Hospitals Bristol NHS Foundation Trust and University of Bristol Bristol UK