PMC:7212965 / 98447-98552 JSONTXT

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    LitCovid-sentences

    {"project":"LitCovid-sentences","denotations":[{"id":"T993","span":{"begin":60,"end":105},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Sources include existing systematic reviews where possible. If not available, primary sources are listed."}