PubMed:32049687 / 821-828
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T147","span":{"begin":0,"end":7},"obj":"NN"}],"text":"contact"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok166","span":{"begin":0,"end":7},"obj":"NN"}],"text":"contact"}