PMC:7463108 / 3431-3507 JSONTXT

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    LitCovid-PD-CLO

    {"project":"LitCovid-PD-CLO","denotations":[{"id":"T91511","span":{"begin":39,"end":40},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"}],"text":" In fact, the opioid crisis is seen as a major roadblock in several aspects "}