PubMed:32077115 / 637-642
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T95","span":{"begin":0,"end":5},"obj":"NN"}],"text":"ratio"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok106","span":{"begin":0,"end":5},"obj":"NN"}],"text":"ratio"}