PubMed:32125131 / 1598-1604
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T341","span":{"begin":0,"end":6},"obj":"NN"}],"text":"period"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok390","span":{"begin":0,"end":6},"obj":"NN"}],"text":"period"}