1. National Drug and Alcohol Research Centre, UNSW, Sydney 2052, Australia
2. International Consortium for Health Outcomes Measurement, London W12 8EU, UK
3. Department of Family Medicine, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand
4. Department of Epidemiology, Faculty of Medicine, Prince of Songkla University, Songkhla 90110, Thailand
5. School of Psychology, Brain and Mind Centre, Faculty of Science, University of Sydney, Sydney 2006, Australia
6. Department of Psychiatry, University College London, London NW1 2AE, UK
7. Department of Psychiatry, Cambridge University, Cambridge CB2 1QW, UK
8. Amsterdam University Medical Centers, Department of Psychiatry, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
9. Northwick Park Hospital, Central and North West London Trust, London HA1 3UJ, UK
10. School of Social Work, Rutgers, The State University of New Jersey, New Brunswick, NJ 08901, USA
11. Department of Epidemiology, College of Medicine & Public Health and Health Professions, University of Florida, Homestead, FL 33031, USA
12. Independent Researcher, South Berwick, ME 03908, USA
13. Department of Psychology, Faculty of Community and Health, European Monitoring Centre for Drugs and Drug Addiction, 1249-289 Lisbon, Portugal
14. Department of Biostatistics, School of Public Health, University of the Western Cape, Cape Town 7535, South Africa
15. Department of Biostatistics, School of Public Health, Yale University, New Haven, CT 06511, USA
16. The Voices Project, Las Vegas, NV 89149, USA
17. Network of Alcohol and Other Drugs Agencies, Sydney 2751, Australia
18. Illawarra Health and Medical Research Institute, University of Wollongong, Wollongong 2522, Australia
19. Discipline of Addiction Medicine, Faculty of Medicine and Health, University of Sydney, Sydney 2006, Australia
20. Independent Researcher, Sydney 2000, Australia
21. Addictions and Related Research Group, Sangath, Bardez 403501, Goa, India
22. Centre for Global Mental Health, Department of Population Health, London School of Hygiene and Tropical Medicine, London WC1E 7HT, UK
23. Addictions Department, King’s College London, London SE1 9NH, UK
24. School of Social Work, University of Pittsburgh, Pittsburgh, PA 15213, USA
25. Translational Psychiatry Unit, Universität zu Lübeck, 23562 Lübeck, Germany
26. Institute for Mental Health Policy Research, Centre for Addiction and Mental Health, Toronto, ON M6J 1H4, Canada
27. Department of Philosophy, King’s College London, London SE1 9NH, UK
28. Drug and Alcohol Research Network, School of Psychology, Queen’s University Belfast, Belfast BT9 5AJ, UK
29. Institute of Mental Health Sciences, Ulster University, Coleraine BT52 1SA, UK
30. Addiction Service, Hospital del Mar, 08003 Barcelona, Spain
31. Build on Belief, London SW5 9HB, UK