PMC:7275193 / 1246-1291 JSONTXT

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    LitCovid-PD-CLO

    {"project":"LitCovid-PD-CLO","denotations":[{"id":"T13","span":{"begin":18,"end":30},"obj":"http://purl.obolibrary.org/obo/OBI_0000245"},{"id":"T14","span":{"begin":43,"end":44},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"}],"text":" the World Health Organization declared it a "}