PMC:7396557 / 2600-2721 JSONTXT

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    LitCovid-PD-CLO

    {"project":"LitCovid-PD-CLO","denotations":[{"id":"T73986","span":{"begin":51,"end":52},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"}],"text":"V). On January 30, 2020, the epidemic was declared a public health emergency of international concern by the World Health"}