PubMed:31992388 / 142-143
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T21","span":{"begin":0,"end":1},"obj":"DT"}],"text":"A"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok23","span":{"begin":0,"end":1},"obj":"DT"}],"text":"A"}