PubMed:32164400 / 630-632
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T108","span":{"begin":0,"end":2},"obj":"CD"}],"text":"33"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok129","span":{"begin":0,"end":2},"obj":"CD"}],"text":"33"}