PubMed:32134681 / 2087-2091
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T401","span":{"begin":0,"end":4},"obj":"NN"}],"text":"sign"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok479","span":{"begin":0,"end":4},"obj":"NN"}],"text":"sign"}