1. Department of Global Public Health, University of California San Diego, San Diego, USA
2. Department of Public Health and Policy, London School of Hygiene and Tropical Medicine, London, UK
3. Centre for Research on Drugs and Health Behaviour, London School of Hygiene and Tropical Medicine, London, UK
4. Program Impact Unit, International HIV/AIDS Alliance, Brighton, UK
5. Department of Health Research, University of Lancaster, Lancaster, UK
6. Management Sciences for Health, Dhaka, Bangladesh
7. Treatment, Procurement and Supply Management Department, International HIV/AIDS Alliance Ukraine, Kyiv, Ukraine
8. Tanzanian Network of People who Use Drugs, MDM Drop in centre, Dar es Salaam, Tanzania
9. International Center for AIDS Care and Treatment Programs, Columbia University, New York, USA
10. School of Social and Community Medicine, University of Bristol, Bristol, UK