PubMed:32031570 / 1282-1284
Annnotations
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok220","span":{"begin":0,"end":2},"obj":"CD"}],"text":"22"}
LitCovid-PD-CLO
{"project":"LitCovid-PD-CLO","denotations":[{"id":"T5","span":{"begin":0,"end":2},"obj":"http://purl.obolibrary.org/obo/CLO_0050507"}],"text":"22"}