PubMed:32172546 / 2313-2320
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T344","span":{"begin":0,"end":7},"obj":"NNS"}],"text":"changes"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok381","span":{"begin":0,"end":7},"obj":"NNS"}],"text":"changes"}