PubMed:31996494 / 1147-1154
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T190","span":{"begin":0,"end":7},"obj":"NNS"}],"text":"options"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok208","span":{"begin":0,"end":7},"obj":"NNS"}],"text":"options"}