PubMed:31996494 / 85-89 JSON TXT

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{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T16","span":{"begin":2,"end":3},"obj":"-COMMA-"}],"text":"20, "}

{"project":"LitCovid-TimeML","denotations":[{"id":"tok22","span":{"begin":2,"end":3},"obj":","}],"text":"20, "}