PMC:7796111 / 26227-26338 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T181","span":{"begin":0,"end":111},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"The frequency of combined reported PCR testing (swab and saliva) completion was used as the dependent variable."}