PubMed:32141570 / 2434-2440
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T398","span":{"begin":0,"end":6},"obj":"NN"}],"text":"burden"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok444","span":{"begin":0,"end":6},"obj":"NN"}],"text":"burden"}