PMC:7386785 / 40383-40427 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T393","span":{"begin":0,"end":44},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Could the patient flow have introduced bias?"}