PMC:7463108 / 2913-2997 JSONTXT

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    LitCovid-PD-CLO

    {"project":"LitCovid-PD-CLO","denotations":[{"id":"T6940","span":{"begin":66,"end":67},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"}],"text":" opioids, the U.S. Government declared the opioid crisis/epidemic a public health em"}