PMC:7473478 / 30803-30853 JSONTXT

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    LitCovid-sentences

    {"project":"LitCovid-sentences","denotations":[{"id":"T266","span":{"begin":0,"end":50},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Twice with an interval of 1 week Phase 2 USA 93"}