PubMed:32156607 / 842-849
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T138","span":{"begin":0,"end":7},"obj":"NN"}],"text":"contact"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok145","span":{"begin":0,"end":7},"obj":"NN"}],"text":"contact"}