PubMed:32172226 / 770-772
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T119","span":{"begin":0,"end":2},"obj":"CD"}],"text":"40"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok132","span":{"begin":0,"end":2},"obj":"CD"}],"text":"40"}