PubMed:32134681 / 1173-1175
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T194","span":{"begin":0,"end":2},"obj":"CD"}],"text":"18"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok222","span":{"begin":0,"end":2},"obj":"CD"}],"text":"18"}
LitCovid-PD-CLO
{"project":"LitCovid-PD-CLO","denotations":[{"id":"T12","span":{"begin":0,"end":2},"obj":"http://purl.obolibrary.org/obo/CLO_0050510"}],"text":"18"}