PubMed:32031570 / 2820-2822
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T560","span":{"begin":0,"end":2},"obj":"CD"}],"text":"20"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok658","span":{"begin":0,"end":2},"obj":"CD"}],"text":"20"}
MeasurableQuantitativeAnnotation
{"project":"MeasurableQuantitativeAnnotation","denotations":[{"id":"N5","span":{"begin":0,"end":2},"obj":"num"}],"text":"20"}