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. 2020 Sep 28;216:108314. doi: 10.1016/j.drugalcdep.2020.108314

Fig. 3.

Fig. 3

Fentanyl includes fentanyl and fentanyl analogs. Heroin includes heroin and morphine. Pills include semi-synthetic opioids –i.e., oxycodone, hydrocodone, hydromorphone, oxymorphone – benzodiazepines, 3,4-methylenedioxy-methamphetamine (MDMA)).