PubMed:32049687 / 949-959
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T164","span":{"begin":0,"end":10},"obj":"JJ"}],"text":"protective"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok183","span":{"begin":0,"end":10},"obj":"JJ"}],"text":"protective"}