PubMed:32112549 / 843-849
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T137","span":{"begin":0,"end":6},"obj":"NN"}],"text":"system"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok141","span":{"begin":0,"end":6},"obj":"NN"}],"text":"system"}