PMC:7781500 / 19941-20053 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T203","span":{"begin":0,"end":112},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"This study design was based on telephonic interviews, which might be responsible for some degree of recall bias."}