PubMed:32027573 / 1244-1246
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T240","span":{"begin":0,"end":2},"obj":"CD"}],"text":"28"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok265","span":{"begin":0,"end":2},"obj":"CD"}],"text":"28"}
MeasurableQuantitativeAnnotation
{"project":"MeasurableQuantitativeAnnotation","denotations":[{"id":"N3","span":{"begin":0,"end":2},"obj":"num"}],"text":"28"}