PubMed:32064853 / 120-122
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T20","span":{"begin":0,"end":2},"obj":"DT"}],"text":"An"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok23","span":{"begin":0,"end":2},"obj":"DT"}],"text":"An"}