PubMed:32167524 / 948-959
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T151","span":{"begin":0,"end":11},"obj":"JJ"}],"text":"demographic"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok165","span":{"begin":0,"end":11},"obj":"JJ"}],"text":"demographic"}