PubMed:32156607 / 273-275
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T51","span":{"begin":0,"end":2},"obj":"CD"}],"text":"80"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok54","span":{"begin":0,"end":2},"obj":"CD"}],"text":"80"}