PubMed:32118640 / 270-275
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T42","span":{"begin":0,"end":5},"obj":"NN"}],"text":"study"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok46","span":{"begin":0,"end":5},"obj":"NN"}],"text":"study"}