PubMed:32217556 / 1978-1980
Annnotations
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok425","span":{"begin":1,"end":2},"obj":"NN"}],"text":"4/"}
MeasurableQuantitativeAnnotation
{"project":"MeasurableQuantitativeAnnotation","denotations":[{"id":"N10","span":{"begin":0,"end":2},"obj":"num"}],"text":"4/"}