PubMed:32134681 / 848-850
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T135","span":{"begin":0,"end":2},"obj":"CD"}],"text":"23"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok151","span":{"begin":0,"end":2},"obj":"CD"}],"text":"23"}