PubMed:32167153 / 329-338
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T54","span":{"begin":0,"end":9},"obj":"NNS"}],"text":"countries"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok58","span":{"begin":0,"end":9},"obj":"NNS"}],"text":"countries"}