PubMed:31994742 / 835-839
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T149","span":{"begin":0,"end":4},"obj":"CD"}],"text":"2020"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok170","span":{"begin":0,"end":4},"obj":"CD"},{"id":"lookup37","span":{"begin":0,"end":4},"obj":"year"}],"text":"2020"}