PubMed:32056249 / 926-938
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T147","span":{"begin":0,"end":12},"obj":"NN"}],"text":"introduction"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok161","span":{"begin":0,"end":12},"obj":"NN"}],"text":"introduction"}