PMC:7386785 / 37887-37971 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T380","span":{"begin":0,"end":83},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Could the conduct or interpretation of the reference standard have introduced bias? "}