PubMed:32031570 / 271-275
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T43","span":{"begin":1,"end":4},"obj":"CC"}],"text":" but"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok50","span":{"begin":1,"end":4},"obj":"CC"}],"text":" but"}