PubMed:32031570 / 1818-1821
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T327","span":{"begin":0,"end":3},"obj":"CD"}],"text":"261"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok380","span":{"begin":0,"end":3},"obj":"CD"}],"text":"261"}