PubMed:32167166 / 86-100
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T14","span":{"begin":5,"end":12},"obj":"NN"}],"text":"tive history o"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok17","span":{"begin":5,"end":12},"obj":"NN"}],"text":"tive history o"}