1 Faculty of Public Health Drugs Special Interest Group, London, UK; School of Psychological Science, University of Bristol, Bristol BS8 2BN, UK; School of Population Health Sciences, University of Bristol, Bristol BS8 2BN, UK; Department of Public Health, Faculty of Public Health and Policy, London School of Hygiene and Tropical Medicine, London, UK. Electronic address: [email protected].
2 Institute of Pharmaceutical Science, King's College London, London, UK; National Programme on Substance Abuse Deaths, King's College London, London, UK.
3 Faculty of Public Health Drugs Special Interest Group, London, UK; Drug and Alcohol Research Network, School of Psychology, Queen's University Belfast, Belfast, UK.
4 Faculty of Public Health Drugs Special Interest Group, London, UK; Department of Public Health, Faculty of Public Health and Policy, London School of Hygiene and Tropical Medicine, London, UK; National Addiction Centre, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK.
5 Faculty of Public Health Drugs Special Interest Group, London, UK; Association of Directors of Public Health, London, UK.
6 Faculty of Public Health Drugs Special Interest Group, London, UK; Public Health Directorate, NHS Grampian, Aberdeen, UK; School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Aberdeen, UK.
7 Faculty of Public Health, London, UK.
8 Faculty of Public Health Drugs Special Interest Group, London, UK; Department of Public Health, Faculty of Public Health and Policy, London School of Hygiene and Tropical Medicine, London, UK.