PubMed:32156607 / 671-682
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T111","span":{"begin":0,"end":11},"obj":"VBN"}],"text":"established"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok116","span":{"begin":0,"end":11},"obj":"VBN"}],"text":"established"}