PubMed:32118389 / 1190-1192
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T218","span":{"begin":0,"end":2},"obj":"CD"}],"text":"13"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok233","span":{"begin":0,"end":2},"obj":"CD"}],"text":"13"}