1. Increases in drug and opioid overdose deaths—United States, 2000-2014;Rudd;MMWR Morb Mortal Wkly Rep,2016
2. Acetyl fentanyl overdose fatalities—Rhode Island, March–May 2013;Ogilvie;MMWR Morb Mortal Wkly Rep,2013
3. Centers for Disease Control & Prevention. Increases in fentanyl drug confiscations and fentanyl-related overdose fatalities. October 26, 2015. Available at: http://emergency.cdc.gov/han/han00384.asp. Accessed April 24, 2016.
4. Sacramento County fentanyl fatalities at 12, could grow;Buck;Sacramento Bee,2016
5. Counterfeit Norco poisoning outbreak San Francisco Bay Area, California, March 25–April 5, 2016;Vo;MMWR Morb Mortal Wkly Rep,2016