PubMed:32052373 / 1368-1375
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T192","span":{"begin":0,"end":7},"obj":"NNS"}],"text":"lessons"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok216","span":{"begin":0,"end":7},"obj":"NNS"}],"text":"lessons"}