PubMed:32145714 / 430-439
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T71","span":{"begin":0,"end":9},"obj":"VBN"}],"text":"performed"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok81","span":{"begin":0,"end":9},"obj":"VBN"},{"id":"event3","span":{"begin":0,"end":9},"obj":"OCCURRENCE"}],"text":"performed"}