PubMed:32154135 / 1643-1651
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T304","span":{"begin":0,"end":8},"obj":"VBN"}],"text":"observed"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok338","span":{"begin":0,"end":8},"obj":"VBN"},{"id":"event13","span":{"begin":0,"end":8},"obj":"OCCURRENCE"}],"text":"observed"}