PubMed:32149769 / 2137-2139
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T333","span":{"begin":0,"end":2},"obj":"CD"}],"text":"48"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok445","span":{"begin":0,"end":2},"obj":"CD"}],"text":"48"}