PMC:7444865 / 0-49 JSONTXT

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    LitCovid-PD-CLO

    {"project":"LitCovid-PD-CLO","denotations":[{"id":"T1","span":{"begin":41,"end":42},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"}],"text":"Survey of the Health of Urban Residents: a Commun"}