PubMed:32150360 / 1099-1112
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T188","span":{"begin":0,"end":13},"obj":"NN"}],"text":"investigation"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok200","span":{"begin":0,"end":13},"obj":"NN"}],"text":"investigation"}