1. European Monitoring Centre for Drugs and Drug Addiction. Drug‑related deaths and mortality in Europe: update from the EMCDDA expert network, Technical report. Publications Office of the European Union, Luxembourg. [consulted in 11/09/2021] Available from: https://www.emcdda.europa.eu/system/files/publications/13762/TD0221591ENN.pdf
2. European Monitoring Centre for Drugs and Drug Addiction. European Drug Report 2017: Trends and Developments. Publications Office of the European Union, Luxembourg. [consulted in 11/09/2021] Avaliable from: https://www.emcdda.europa.eu/publications/edr/trends‑developments/2017_en
3. World Health Organization. Guidelines for the psychosocially assisted pharmacological treatment of opioid dependence. Geneva: WHO; 2009.4. World Health Organization. Guidelines for the Psychosocially Assisted Pharmacological Treatment of Opioid Dependence. Geneva: WHO; 2009. [consulted in 11/09/2021] Available from: https://www.ncbi.nlm.nih.gov/books/NBK143185/
4. Substance Abuse and Mental Health Services Administration. Results from the 2012 National Survey on Drug Use and Health: Summary of National Findings. NSDUH Series H‑46, HHS Publication No. (SMA) 13‑4795. Rockville: Substance Abuse and Mental Health Services Administration; 2013.
5. Gender Differences in Heroin Addiction and Treatment: Results from the VEdeTTE Cohort