PubMed:32087820 / 510-519
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T79","span":{"begin":0,"end":9},"obj":"NNS"}],"text":"countries"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok87","span":{"begin":0,"end":9},"obj":"NNS"}],"text":"countries"}