PubMed:32149769 / 1196-1208
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T175","span":{"begin":0,"end":12},"obj":"VBN"}],"text":"investigated"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok226","span":{"begin":0,"end":12},"obj":"VBN"},{"id":"event24","span":{"begin":0,"end":12},"obj":"OCCURRENCE"}],"text":"investigated"}