PMC:7210464 / 430-494 JSONTXT

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    LitCovid-PD-CLO

    {"project":"LitCovid-PD-CLO","denotations":[{"id":"T1","span":{"begin":18,"end":30},"obj":"http://purl.obolibrary.org/obo/OBI_0000968"}],"text":"prior are used as instrumental variables for causal inference. S"}