PubMed:32145714 / 1117-1125
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T202","span":{"begin":0,"end":8},"obj":"JJ"}],"text":"negative"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok239","span":{"begin":0,"end":8},"obj":"NN"}],"text":"negative"}