Source: Degenhardt, L., Grebely, J., Stone, J., Hickman, M., Vickerman, P., Marshall, B. D., ... & Larney, S. (2019). Global patterns of opioid use and dependence: harms to populations, interventions, and future action. The Lancet, 394(10208), 1560-1579. Summary We summarise the evidence for...