PubMed:32118640 / 10-21
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T2","span":{"begin":2,"end":9},"obj":"NNS"}],"text":"f factors a"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok3","span":{"begin":2,"end":9},"obj":"NNS"}],"text":"f factors a"}