PubMed:31996494 / 600-609
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T102","span":{"begin":0,"end":9},"obj":"NNS"}],"text":"databases"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok116","span":{"begin":0,"end":9},"obj":"NNS"}],"text":"databases"}