PubMed:32156607 / 1081-1085
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T178","span":{"begin":0,"end":4},"obj":"NNS"}],"text":"ages"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok188","span":{"begin":0,"end":4},"obj":"NNS"}],"text":"ages"}