PubMed:32061200 / 609-611
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T107","span":{"begin":0,"end":2},"obj":"CD"}],"text":"15"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok117","span":{"begin":0,"end":2},"obj":"CD"}],"text":"15"}