PubMed:32219428 / 1527-1529
Annnotations
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok265","span":{"begin":0,"end":2},"obj":"CD"}],"text":"22"}
LitCovid-PD-CLO
{"project":"LitCovid-PD-CLO","denotations":[{"id":"T11","span":{"begin":0,"end":2},"obj":"http://purl.obolibrary.org/obo/CLO_0050507"}],"text":"22"}