PMC:7463108 / 2197-2422 JSONTXT

{"project":"LitCovid-PD-CLO","denotations":[{"id":"T32967","span":{"begin":73,"end":74},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"}],"text":"rica remains the region with the highest non-medical use of opioids with a staggering 4% of the population aged 15–64 using opioids (UNODC 2019a, c). In 2017, the burden of opioid use in the U.S. had accounted for 42 million "}