PubMed:31995857 / 1248-1252
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T221","span":{"begin":0,"end":4},"obj":"NNS"}],"text":"days"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok246","span":{"begin":0,"end":4},"obj":"NNS"},{"id":"lookup41","span":{"begin":0,"end":4},"obj":"date_unit"}],"text":"days"}