PubMed:32091414 / 347-349
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T55","span":{"begin":0,"end":2},"obj":"CD"}],"text":"80"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok59","span":{"begin":0,"end":2},"obj":"CD"}],"text":"80"}