PubMed:32026671 / 2404-2410
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T417","span":{"begin":0,"end":6},"obj":"NNS"}],"text":"levels"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok457","span":{"begin":0,"end":6},"obj":"NNS"}],"text":"levels"}