PubMed:32087820 / 265-267
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T40","span":{"begin":0,"end":2},"obj":"CD"}],"text":"12"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok45","span":{"begin":0,"end":2},"obj":"CD"}],"text":"12"}