PubMed:32118389 / 2453-2455
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T503","span":{"begin":0,"end":2},"obj":"CD"}],"text":"77"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok552","span":{"begin":0,"end":2},"obj":"CD"}],"text":"77"}