PubMed:32176772 / 1500-1508
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T310","span":{"begin":0,"end":8},"obj":"JJ"}],"text":"frequent"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok360","span":{"begin":0,"end":8},"obj":"JJ"}],"text":"frequent"}