PubMed:31995857 / 1289-1293
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T229","span":{"begin":0,"end":4},"obj":"NNS"}],"text":"days"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok257","span":{"begin":0,"end":4},"obj":"NNS"},{"id":"lookup43","span":{"begin":0,"end":4},"obj":"date_unit"}],"text":"days"}