PubMed:32209890 / 1060-1065
Annnotations
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok190","span":{"begin":0,"end":5},"obj":"NNS"},{"id":"lookup28","span":{"begin":0,"end":5},"obj":"date_unit"}],"text":"years"}
MeasurableQuantitativeAnnotation
{"project":"MeasurableQuantitativeAnnotation","denotations":[{"id":"U1","span":{"begin":0,"end":5},"obj":"unit"}],"text":"years"}