PubMed:31996494 / 444-451
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T80","span":{"begin":0,"end":7},"obj":"NNS"}],"text":"methods"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok94","span":{"begin":0,"end":7},"obj":"NNS"}],"text":"methods"}