PubMed:32164400 / 1096-1103
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T199","span":{"begin":0,"end":7},"obj":"NNS"}],"text":"factors"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok255","span":{"begin":0,"end":7},"obj":"NNS"}],"text":"factors"}