PMC:7045882 / 341-463 JSONTXT

{"project":"LitCovid-PD-CLO","denotations":[{"id":"T1","span":{"begin":36,"end":46},"obj":"http://purl.obolibrary.org/obo/CLO_0001658"},{"id":"T2","span":{"begin":106,"end":107},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"}],"text":"r, omissions and errors in previous activities can occur when the investigation is performed through only a proxy intervie"}