PubMed:31995857 / 1745-1756
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T310","span":{"begin":0,"end":11},"obj":"NNS"}],"text":"populations"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok349","span":{"begin":0,"end":11},"obj":"NNS"}],"text":"populations"}