PubMed:32113196 / 1537-1543
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T273","span":{"begin":0,"end":6},"obj":"NN"}],"text":"period"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok328","span":{"begin":0,"end":6},"obj":"NN"}],"text":"period"}