PubMed:32061200 / 935-944
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T163","span":{"begin":0,"end":9},"obj":"NNS"}],"text":"opacities"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok178","span":{"begin":0,"end":9},"obj":"NNS"}],"text":"opacities"}