PubMed:32061200 / 1191-1192
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T211","span":{"begin":0,"end":1},"obj":"CD"}],"text":"3"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok230","span":{"begin":0,"end":1},"obj":"CD"}],"text":"3"}