PubMed:32083638 / 1039-1048
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T160","span":{"begin":0,"end":9},"obj":"JJ"}],"text":"essential"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok186","span":{"begin":0,"end":9},"obj":"JJ"}],"text":"essential"}