PubMed:32167524 / 1253-1255
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T213","span":{"begin":0,"end":2},"obj":"CD"}],"text":"44"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok235","span":{"begin":0,"end":2},"obj":"CD"}],"text":"44"}