PubMed:32052373 / 552-557
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T78","span":{"begin":0,"end":5},"obj":"NNS"}],"text":"units"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok94","span":{"begin":0,"end":5},"obj":"NNS"}],"text":"units"}