1. UNODC. Understanding the global opioid crisis [Internet]. Glob. SMART Updat. 2019.
2. CDC. Centers for Disease Control and Prevention, National Center for Injury Prevention and Control [Internet]. Other drugs. 2021.
3. UNODC. United Nations Office on Drugs and Crime (UNODC) [Internet]. World Drug Rep. 2021, Exec. Summ. Polices Implic. 2021.
4. UNODC. United Nations Office on Drugs and Crime (UNODC) [Internet]. World Drug Rep. 2018, Summ. Policy Find. Implic. 2018.
5. Degenhardt L, Grebely J, Stone J, Hickman M, Vickerman P, Marshall BDL, et al. Global patterns of opioid use and dependence: harms to populations, interventions, and future action. Lancet (London, England). 2019;394:1560–79. https://doi.org/10.1016/S0140-6736(19)32229-9.