PubMed:32052373 / 964-971
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T135","span":{"begin":0,"end":7},"obj":"NN"}],"text":"concern"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok153","span":{"begin":0,"end":7},"obj":"NN"}],"text":"concern"}