PMC:7396557 / 566-634 JSONTXT

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{"project":"LitCovid-sentences","denotations":[{"id":"T7","span":{"begin":4,"end":20},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"9.\n\nAim of the Study\nThe objectives of this review are to provide up"}