PubMed:32031570 / 2682-2687
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T522","span":{"begin":0,"end":5},"obj":"NNS"}],"text":"years"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok614","span":{"begin":0,"end":5},"obj":"NNS"},{"id":"lookup72","span":{"begin":0,"end":5},"obj":"date_unit"}],"text":"years"}
MeasurableQuantitativeAnnotation
{"project":"MeasurableQuantitativeAnnotation","denotations":[{"id":"U2","span":{"begin":0,"end":5},"obj":"unit"}],"text":"years"}