PubMed:32105637 / 1929-1938
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T416","span":{"begin":0,"end":9},"obj":"NNS"}],"text":"opacities"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok462","span":{"begin":0,"end":9},"obj":"NNS"}],"text":"opacities"}