PubMed:32133152 / 1515-1521
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T221","span":{"begin":0,"end":6},"obj":"NNS"}],"text":"phases"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok262","span":{"begin":0,"end":6},"obj":"NNS"}],"text":"phases"}