PubMed:32118390 / 1723-1725
Annnotations
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok462","span":{"begin":0,"end":2},"obj":"CD"}],"text":"18"}
LitCovid-PD-CLO
{"project":"LitCovid-PD-CLO","denotations":[{"id":"T16","span":{"begin":0,"end":2},"obj":"http://purl.obolibrary.org/obo/CLO_0050510"}],"text":"18"}
MeasurableQuantitativeAnnotation
{"project":"MeasurableQuantitativeAnnotation","denotations":[{"id":"N23","span":{"begin":0,"end":2},"obj":"num"}],"text":"18"}