1. United Nations Office on Drugs and Crime. Special Points of Interest: World Drug Report 2023. Accessed April 14, 2024. https://www.unodc.org/res/WDR-2023/Special_Points_WDR2023_web_DP.pdf
2. Management of opioid use disorder in the USA: present status and future directions
3. Joseph H, Stancliff S, Langrod J. Methadone maintenance treatment (MMT): a review of historical and clinical issues. Mt Sinai J Med. 2000;67(5-6):347-364.
4. Methadone and buprenorphine for the management of opioid dependence: a systematic review and economic evaluation
5. Cigarette smoking and interest in quitting in methadone maintenance patients