PubMed:32074786 / 2717-2721
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T406","span":{"begin":0,"end":4},"obj":"NN"}],"text":"mask"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok436","span":{"begin":0,"end":4},"obj":"NN"}],"text":"mask"}