PMC:7340764 / 1987-2035 JSONTXT

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    LitCovid-sentences

    {"project":"LitCovid-sentences","denotations":[{"id":"T12","span":{"begin":2,"end":14},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"\n\nIntroduction\nThe primary health care system in"}