1. National Institute of Health, National Institute on Drug Abuse. What is the Federal Government Doing to Combat the Opioid Abuse Epidemic? https://www.drugabuse.gov/about-nida/legislative-activities/testimony-to-congress/2016/what-federal-government-doing-to-combat-opioid-abuse-epidemic. Accessed 13.04.17.
2. American Society of Addiction Medicine. Opioid Addiction 2016 Facts and Figures. https://www.asam.org/docs/default-source/advocacy/opioid-addiction-disease-facts-figures.pdf. Accessed 24.06.17.
3. Department of Health and Human Services. Addressing Prescription Drug Abuse in the United States. https://www.cdc.gov/drugoverdose/pdf/hhs_prescription_drug_abuse_report_09.2013.pdf. Accessed 13.04.17.
4. Huff S. States aim to limit opioid prescriptions. ACP Internist. http://www.acpinternist.org/archives/2016/10/laws.htm. Accessed 15.03.17.
5. Drug Enforcement Administration. DEA Reduced Amount of Opioid Controlled Substances to be Manufacture in 2017. https://www.dea.gov/divisions/hq/2016/hq100416.shtml. Accessed 12.03.17.