PubMed:31994742 / 523-525
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T93","span":{"begin":0,"end":2},"obj":"CD"}],"text":"25"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok104","span":{"begin":0,"end":2},"obj":"CD"}],"text":"25"}