PubMed:32133830 / 27-31
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T4","span":{"begin":1,"end":3},"obj":"IN"}],"text":" on "}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok5","span":{"begin":1,"end":3},"obj":"IN"}],"text":" on "}