PMC:7386785 / 39334-39615 JSONTXT

{"project":"LitCovid-PD-CLO","denotations":[{"id":"T14318","span":{"begin":25,"end":26},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"},{"id":"T45022","span":{"begin":82,"end":83},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"},{"id":"T52926","span":{"begin":169,"end":173},"obj":"http://purl.obolibrary.org/obo/UBERON_0000473"},{"id":"T65857","span":{"begin":193,"end":197},"obj":"http://purl.obolibrary.org/obo/UBERON_0000473"}],"text":"Did all patients receive a reference standard? YES: if all participants received a reference standard (clearly no partial verification).NO: if only (part of) the index test‐positives or index test‐negatives received the complete reference standard.UNCLEAR: if it was not reported."}

{"project":"LitCovid-sentences","denotations":[{"id":"T387","span":{"begin":0,"end":46},"obj":"Sentence"},{"id":"T388","span":{"begin":48,"end":281},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Did all patients receive a reference standard? YES: if all participants received a reference standard (clearly no partial verification).NO: if only (part of) the index test‐positives or index test‐negatives received the complete reference standard.UNCLEAR: if it was not reported."}