PubMed:32150360 / 4454-4457
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T749","span":{"begin":0,"end":3},"obj":"VBN"}],"text":"led"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok816","span":{"begin":0,"end":3},"obj":"VBN"},{"id":"event6","span":{"begin":0,"end":3},"obj":"OCCURRENCE"}],"text":"led"}