PMC:7784824 / 18942-19073 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T198","span":{"begin":0,"end":131},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Pieri et al. also found that IgA detected by the ELISA assay might be a more reliable and stable early serological marker than IgM."}