PubMed:32077115 / 1250-1257
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T214","span":{"begin":0,"end":7},"obj":"NNS"}],"text":"smokers"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok254","span":{"begin":0,"end":7},"obj":"NNS"}],"text":"smokers"}