PubMed:32171193 / 462-467
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T73","span":{"begin":0,"end":5},"obj":"NN"}],"text":"tract"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok83","span":{"begin":0,"end":5},"obj":"NN"}],"text":"tract"}