1. US Health and Human Services. HHS acting secretary declares public health emergency to address national opioid crisis. Available at: https://www.hhs.gov/about/news/2017/10/26/hhs-acting-secretary-declares-public-health-emergency-address-national-opioid-crisis.html. Accessed Jan 24, 2019.
2. National Institute on Drug Abuse. Opioid overdose crisis. Updated January 2019. Available at: https://www.drugabuse.gov/drugs-abuse/opioids/opioid-overdose-crisis. Accessed March 20, 2019.
3. Substance Abuse and Mental Health Services Administration. Key substance use and mental health indicators in the United States: results from the 2017 national survey on drug use and health (HHS Publication No. SMA 18-5068, NSDUH Series H-53). 2018. Available at: https://www.samhsa.gov/data/report/2017-nsduh-annual-national-report. Accessed March 20, 2019.
4. US Department of Health and Human Services. Pain management best practices inter-agency task force report: updates, gaps, inconsistencies, and recommendations. 2019. Available at: https://www.hhs.gov/sites/default/files/pmtf-final-report-2019-05-23.pdf. Accessed July 1, 2019.
5. Khanna IK, Pillarisetti S. Buprenorphine—an attractive opioid with underutilized potential in treatment of chronic pain. J Pain Res. 2015;8:859–70.