PubMed:32133830 / 1261-1269
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T231","span":{"begin":0,"end":8},"obj":"NNS"}],"text":"contacts"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok264","span":{"begin":0,"end":8},"obj":"NNS"}],"text":"contacts"}