1. Department of Public Health, Environments and Society; London School of Hygiene and Tropical Medicine; London UK
2. Department of Pharmacy and Pharmacology; University of Bath; Bath UK
3. Institute of Psychiatry, Psychology and Neuroscience; National Addiction Centre, King's College London; London UK
4. Kings Department of Family and Community Medicine; University of California, San Francisco; San Francisco CA USA
5. Public Health Institute; Liverpool John Moores University; Liverpool UK
6. Humanitarian Public Health Technical Unit; Save the Children UK; London UK