PubMed:32087623 / 557-561
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T85","span":{"begin":0,"end":4},"obj":"VBN"}],"text":"used"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok89","span":{"begin":0,"end":4},"obj":"VBN"},{"id":"event15","span":{"begin":0,"end":4},"obj":"OCCURRENCE"}],"text":"used"}