PubMed:32062957 / 513-515
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T78","span":{"begin":0,"end":2},"obj":"CD"}],"text":"20"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok83","span":{"begin":0,"end":2},"obj":"CD"}],"text":"20"}
MeasurableQuantitativeAnnotation
{"project":"MeasurableQuantitativeAnnotation","denotations":[{"id":"N2","span":{"begin":0,"end":2},"obj":"num"}],"text":"20"}