PMC:7160614 / 4420-4587 JSONTXT

{"project":"LitCovid-PD-CLO","denotations":[{"id":"T27","span":{"begin":119,"end":122},"obj":"http://purl.obolibrary.org/obo/CLO_0051582"},{"id":"T28","span":{"begin":163,"end":165},"obj":"http://purl.obolibrary.org/obo/CLO_0050510"}],"text":"However, false-negative results caused by unstable specimen processing are relatively high in clinical practice, which has worsened the spread of the outbreak [15–18]."}

{"project":"LitCovid-sentences","denotations":[{"id":"T39","span":{"begin":0,"end":167},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"However, false-negative results caused by unstable specimen processing are relatively high in clinical practice, which has worsened the spread of the outbreak [15–18]."}