PubMed:32093211 / 818-820
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T139","span":{"begin":0,"end":2},"obj":"CD"}],"text":"45"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok153","span":{"begin":0,"end":2},"obj":"CD"}],"text":"45"}