PubMed:32074786 / 870-885
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T142","span":{"begin":0,"end":15},"obj":"JJ"}],"text":"screen-negative"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok152","span":{"begin":0,"end":15},"obj":"JJ"}],"text":"screen-negative"}