PubMed:32031570 / 503-509
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T76","span":{"begin":0,"end":6},"obj":"NN"}],"text":"series"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok85","span":{"begin":0,"end":6},"obj":"NN"}],"text":"series"}