PubMed:32171865 / 1778-1787
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T345","span":{"begin":0,"end":9},"obj":"VBD"}],"text":"underwent"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok393","span":{"begin":0,"end":9},"obj":"VBD"},{"id":"event8","span":{"begin":0,"end":9},"obj":"OCCURRENCE"}],"text":"underwent"}