PubMed:32118640 / 300-307
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T47","span":{"begin":0,"end":7},"obj":"NNS"}],"text":"factors"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok51","span":{"begin":0,"end":7},"obj":"NNS"}],"text":"factors"}