PubMed:32164400 / 1220-1227
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T222","span":{"begin":0,"end":7},"obj":"NN"}],"text":"cluster"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok280","span":{"begin":0,"end":7},"obj":"NN"}],"text":"cluster"}