PubMed:32232652 / 680-682 JSON TXT

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{"project":"LitCovid-TimeML","denotations":[{"id":"tok138","span":{"begin":0,"end":1},"obj":"("}],"text":"(6"}

{"project":"MeasurableQuantitativeAnnotation","denotations":[{"id":"N2","span":{"begin":0,"end":2},"obj":"num"}],"text":"(6"}