PubMed:32171193 / 434-439
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T69","span":{"begin":0,"end":5},"obj":"JJ"}],"text":"upper"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok79","span":{"begin":0,"end":5},"obj":"JJ"}],"text":"upper"}