PubMed:31967327 / 648-651
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T106","span":{"begin":0,"end":3},"obj":"DT"}],"text":"All"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok114","span":{"begin":0,"end":3},"obj":"DT"}],"text":"All"}