PMC:7039910 / 14755-14910 JSONTXT

{"project":"LitCovid-PD-CLO","denotations":[{"id":"T45","span":{"begin":61,"end":62},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"}],"text":"difference in number may be due to the possible existence of a large number of mild and asymptomatic cases and the imperfection of current diagnostic measu"}