PubMed:32250385 / 3314-3316 JSONTXT

{"project":"LitCovid-TimeML","denotations":[{"id":"tok840","span":{"begin":0,"end":2},"obj":"CD"}],"text":"15"}

{"project":"MeasurableQuantitativeAnnotation","denotations":[{"id":"U2","span":{"begin":0,"end":1},"obj":"unit"}],"text":"15"}