PMC:7210464 / 23926-23961 JSONTXT

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    LitCovid-PD-CLO

    {"project":"LitCovid-PD-CLO","denotations":[{"id":"T97","span":{"begin":13,"end":25},"obj":"http://purl.obolibrary.org/obo/OBI_0000968"}],"text":"Selection of instrumental variables"}

    LitCovid-sentences

    {"project":"LitCovid-sentences","denotations":[{"id":"T180","span":{"begin":0,"end":35},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Selection of instrumental variables"}