PubMed:32164400 / 1427-1435
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T254","span":{"begin":0,"end":8},"obj":"NNS"}],"text":"contacts"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok315","span":{"begin":0,"end":8},"obj":"NNS"}],"text":"contacts"}