1. A reassessment of trends in the medical use and abuse of opioid analgesics and implications for diversion control: 1997–2002
2. Major increases in opioid analgesic abuse in the United States: Concerns and strategies
3. Office of National Drug Control Policy.Epidemic: responding to America's prescription drug abuse crisis.2001. Available at:http://publications.iowa.gov/12965/1/NationalRxAbusePlan2011.pdf(Archived by WebCite® athttp://www.webcitation.org/78B84QUGSon 6 May 2019). Accessed 6 May 2018.
4. Substance Abuse and Mental Health Services Administration.Results from the 2016 National Survey on drug use and health: detailed tables. Available at:https://www.samhsa.gov/data/report/results‐2016‐national‐survey‐drug‐use‐and‐health‐detailed‐tables https://www.samhsa.gov/data/sites/default/files/NSDUH‐DetTabs‐2016/NSDUH‐DetTabs‐2016.pdf http://www.webcitation.org/78B8UeFhw. Accessed 6 May 2018.
5. US Department of Health and Human Services Fact Sheet.What is the U.S. opioid epidemic?Available at:https://www.hhs.gov/opioids/about‐the‐epidemic/index.html(Archived by WebCite® athttp://www.webcitation.org/78B8kJ26ion 6 May 2019). Accessed 6 May 2018.