PMC:7050133 / 20324-20461 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T117","span":{"begin":0,"end":137},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Despite zigzags, an overall downward trend in F ′′ (x) was clearly revealed by the downward and progressively narrowing down band region."}