PubMed:32050635 / 899-905
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T145","span":{"begin":0,"end":6},"obj":"NNS"}],"text":"stages"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok154","span":{"begin":0,"end":6},"obj":"NNS"}],"text":"stages"}