PubMed:32022276 / 826-834
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T125","span":{"begin":0,"end":8},"obj":"VBN"}],"text":"observed"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok137","span":{"begin":0,"end":8},"obj":"VBN"},{"id":"event11","span":{"begin":0,"end":8},"obj":"OCCURRENCE"}],"text":"observed"}