PubMed:32027573 / 383-388
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T57","span":{"begin":0,"end":5},"obj":"NNS"}],"text":"years"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok71","span":{"begin":0,"end":5},"obj":"NNS"},{"id":"lookup11","span":{"begin":0,"end":5},"obj":"date_unit"}],"text":"years"}