PubMed:32167166 / 1133-1139
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T188","span":{"begin":0,"end":6},"obj":"NNS"}],"text":"traces"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok213","span":{"begin":0,"end":6},"obj":"NNS"}],"text":"traces"}