1. Opioid data analysis and resources. (2021). Accessed. January 26, 2021: https://www.cdc.gov/drugoverdose/data/analysis.html.
2. Vital signs: overdoses of prescription opioid pain relievers — United States, 1999-2008;Paulozzi LJ;MMWR Morb Mortal Wkly Rep,2011
3. Fentanyl law enforcement submissions and increases in synthetic opioid-involved overdose deaths - 27 states, 2013-2014;Gladden RM;MMWR Morb Mortal Wkly Rep,2016
4. Increases in heroin overdose deaths — 28 states, 2010 to 2012;Rudd RA;MMWR Morb Mortal Wkly Rep,2014
5. Opioid crisis statistics. (2020). Accessed. January 26, 2021: https://www.hhs.gov/opioids/about-the-epidemic/opioid-crisis-statistics/index.html.