PubMed:32064853 / 717-725
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T126","span":{"begin":0,"end":8},"obj":"NN"}],"text":"subgroup"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok133","span":{"begin":0,"end":8},"obj":"NN"}],"text":"subgroup"}