PubMed:32112886 / 1390-1392
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T241","span":{"begin":0,"end":2},"obj":"CD"}],"text":"50"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok274","span":{"begin":0,"end":2},"obj":"CD"}],"text":"50"}