PubMed:32057210 / 20-27
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T4","span":{"begin":0,"end":7},"obj":"NN"}],"text":"control"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok5","span":{"begin":0,"end":7},"obj":"NN"}],"text":"control"}