PubMed:32064853 / 1591-1593
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T304","span":{"begin":0,"end":2},"obj":"CD"}],"text":"30"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok345","span":{"begin":0,"end":2},"obj":"CD"}],"text":"30"}