PubMed:32133152 / 686-687
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T113","span":{"begin":0,"end":1},"obj":"NN"}],"text":"R"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok125","span":{"begin":0,"end":1},"obj":"NN"}],"text":"R"}