PubMed:32077115 / 1812-1825
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T314","span":{"begin":0,"end":13},"obj":"NN"}],"text":"investigation"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok378","span":{"begin":0,"end":13},"obj":"NN"}],"text":"investigation"}