PubMed:32133830 / 670-672
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T105","span":{"begin":0,"end":2},"obj":"CD"}],"text":"40"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok112","span":{"begin":0,"end":2},"obj":"CD"}],"text":"40"}