PubMed:32112549 / 517-520
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T83","span":{"begin":0,"end":3},"obj":"CC"}],"text":"but"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok86","span":{"begin":0,"end":3},"obj":"CC"}],"text":"but"}