PubMed:32171865 / 1833-1835
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T354","span":{"begin":0,"end":2},"obj":"CD"}],"text":"69"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok404","span":{"begin":0,"end":2},"obj":"CD"}],"text":"69"}