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PubMed:32031570 / 2861-2863 JSON TXT

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LitCovid-PAS-Enju

{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T576","span":{"begin":0,"end":2},"obj":"CD"}],"text":"31"}

LitCovid-TimeML

{"project":"LitCovid-TimeML","denotations":[{"id":"tok678","span":{"begin":0,"end":2},"obj":"CD"}],"text":"31"}

MeasurableQuantitativeAnnotation

{"project":"MeasurableQuantitativeAnnotation","denotations":[{"id":"N9","span":{"begin":0,"end":2},"obj":"num"}],"text":"31"}