PubMed:31986264 / 1767-1769
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T340","span":{"begin":0,"end":2},"obj":"CD"}],"text":"39"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok370","span":{"begin":0,"end":2},"obj":"CD"}],"text":"39"}