PubMed:32149773 / 129-134
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T17","span":{"begin":0,"end":5},"obj":"NN"}],"text":"trial"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok18","span":{"begin":0,"end":5},"obj":"NN"}],"text":"trial"}