
PubMed:32096367 / 2199-2206
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T312","span":{"begin":0,"end":7},"obj":"NNS"}],"text":"periods"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok348","span":{"begin":0,"end":7},"obj":"NNS"}],"text":"periods"}