PubMed:32176772 / 428-430
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T72","span":{"begin":0,"end":2},"obj":"CD"}],"text":"29"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok78","span":{"begin":0,"end":2},"obj":"CD"}],"text":"29"}