
PubMed:32164400 / 721-727
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T124","span":{"begin":0,"end":6},"obj":"NN"}],"text":"period"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok149","span":{"begin":0,"end":6},"obj":"NN"}],"text":"period"}