PubMed:32064855 / 597-599
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T113","span":{"begin":0,"end":2},"obj":"IN"}],"text":"on"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok118","span":{"begin":0,"end":2},"obj":"IN"}],"text":"on"}