PMC:7405836 / 4927-5002 JSONTXT

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    LitCovid-PD-CLO

    {"project":"LitCovid-PD-CLO","denotations":[{"id":"T43261","span":{"begin":22,"end":23},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"}],"text":"ale, the WHO declared a global health emergency on 31 January 2020; subsequ"}