PubMed:32172226 / 588-593
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T92","span":{"begin":0,"end":5},"obj":"NN"}],"text":"study"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok103","span":{"begin":0,"end":5},"obj":"NN"}],"text":"study"}