PubMed:31992388 / 125-127
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T18","span":{"begin":0,"end":2},"obj":"CD"}],"text":"22"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok19","span":{"begin":0,"end":2},"obj":"CD"}],"text":"22"}