PubMed:32133152 / 106-114
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T17","span":{"begin":0,"end":8},"obj":"NNS"}],"text":"clusters"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok19","span":{"begin":0,"end":8},"obj":"NNS"}],"text":"clusters"}