PubMed:32064853 / 1465-1472
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T280","span":{"begin":0,"end":7},"obj":"NNS"}],"text":"workers"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok316","span":{"begin":0,"end":7},"obj":"NNS"}],"text":"workers"}