PubMed:32176808 / 1220-1223
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T199","span":{"begin":0,"end":3},"obj":"CC"}],"text":"but"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok220","span":{"begin":0,"end":3},"obj":"CC"}],"text":"but"}