PubMed:32050635 / 1528-1530
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T243","span":{"begin":0,"end":2},"obj":"IN"}],"text":"on"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok258","span":{"begin":0,"end":2},"obj":"IN"}],"text":"on"}