PubMed:32064853 / 756-758
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T133","span":{"begin":0,"end":2},"obj":"CD"}],"text":"72"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok141","span":{"begin":0,"end":2},"obj":"CD"}],"text":"72"}