PubMed:32055945 / 1148-1157
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T212","span":{"begin":0,"end":9},"obj":"NNS"}],"text":"opacities"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok253","span":{"begin":0,"end":9},"obj":"NNS"}],"text":"opacities"}