PubMed:32134681 / 2769-2773
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T549","span":{"begin":0,"end":4},"obj":"NN"}],"text":"sign"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok650","span":{"begin":0,"end":4},"obj":"NN"}],"text":"sign"}