PubMed:32027573 / 503-512
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T71","span":{"begin":0,"end":9},"obj":"VBD"}],"text":"underwent"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok87","span":{"begin":0,"end":9},"obj":"VBD"},{"id":"event3","span":{"begin":0,"end":9},"obj":"OCCURRENCE"}],"text":"underwent"}