1. Drug and opioid-involved overdose deaths—United States, 2013–2017.;Scholl;MMWR Morb Mortal Wkly Rep,2018
2. Changes in synthetic opioid involvement in drug overdose deaths in the United States, 2010–2016.;Jones;JAMA,2018
3. Drug Enforcement Administration. 2018 National drug threat assessment. annual drug report, 2018. Springfield, VA: US Department of Justice, Drug Enforcement Administration; 2019. https://www.dea.gov/sites/default/files/2018-11/DIR-032-18%202018%20NDTA%20final%20low%20resolution.pdf
4. Drug Enforcement Administration. Tracking fentanyl and fentanyl-related substances reported in NFLIS-Drug by State, 2016–2017. Springfield, VA: US Department of Justice, Drug Enforcement Administration; 2019. https://www.nflis.deadiversion.usdoj.gov/DesktopModules/ReportDownloads/Reports/NFLISDrugSpecialRelease-Fentanyl-FentanylSubstancesStateMaps-2016-2017.pdf
5. Trends in U.S. drug overdose deaths in non-Hispanic black, Hispanic, and non-Hispanic white persons, 2000–2015.;Shiels;Ann Intern Med,2018