PubMed:31986264 / 662-672
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T99","span":{"begin":0,"end":10},"obj":"NN"}],"text":"collection"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok111","span":{"begin":0,"end":10},"obj":"NN"}],"text":"collection"}