PubMed:32154135 / 898-899
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T151","span":{"begin":0,"end":1},"obj":"CD"}],"text":"2"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok169","span":{"begin":0,"end":1},"obj":"CD"}],"text":"2"}