PubMed:32118640 / 679-681
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T104","span":{"begin":0,"end":2},"obj":"CD"}],"text":"30"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok114","span":{"begin":0,"end":2},"obj":"CD"}],"text":"30"}