PubMed:32118640 / 3001-3006
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T492","span":{"begin":0,"end":5},"obj":"NN"}],"text":"ratio"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok667","span":{"begin":0,"end":5},"obj":"NN"}],"text":"ratio"}