PubMed:32250385 / 2909-2911
Annnotations
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok705","span":{"begin":0,"end":2},"obj":"CD"}],"text":"27"}
LitCovid-PD-CLO
{"project":"LitCovid-PD-CLO","denotations":[{"id":"T13","span":{"begin":0,"end":2},"obj":"http://purl.obolibrary.org/obo/CLO_0050509"}],"text":"27"}