PMC:7160614 / 651-771 JSONTXT

{"project":"LitCovid-PD-CLO","denotations":[{"id":"T7","span":{"begin":83,"end":87},"obj":"http://purl.obolibrary.org/obo/UBERON_0000473"},{"id":"T8","span":{"begin":101,"end":105},"obj":"http://purl.obolibrary.org/obo/UBERON_0000473"}],"text":"were divided into primary (n = 98) and validation (n = 38) cohorts. The chi-square test, Student’s t test, and Kruskal-W"}