PubMed:32088679 / 1181-1188
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T198","span":{"begin":0,"end":7},"obj":"NNS"}],"text":"workers"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok213","span":{"begin":0,"end":7},"obj":"NNS"}],"text":"workers"}