PMC:7784824 / 6916-7021 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T76","span":{"begin":0,"end":105},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"So far, a large number of serological assays have been developed in response to the diagnostic need [14]."}