PMC:7543325 / 3812-3883 JSONTXT

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    LitCovid-PD-CLO

    {"project":"LitCovid-PD-CLO","denotations":[{"id":"T29","span":{"begin":62,"end":70},"obj":"http://purl.obolibrary.org/obo/CLO_0001658"}],"text":", from 1 March 2020 to 24 April 2020.\nWe defined 3 periods of activity "}