PubMed:31996494 / 100-103
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T20","span":{"begin":0,"end":3},"obj":"CD"}],"text":"571"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok26","span":{"begin":0,"end":3},"obj":"CD"}],"text":"571"}