PMC:7796111 / 56964-57104 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T365","span":{"begin":0,"end":140},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Validity was strengthened as data were collected and analysed by researchers who were not involved in the delivery of the testing programme."}