PubMed:32088679 / 1512-1522
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T248","span":{"begin":0,"end":10},"obj":"NN"}],"text":"protection"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok267","span":{"begin":0,"end":10},"obj":"NN"}],"text":"protection"}