PMC:7543267 / 15972-16011 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T105","span":{"begin":0,"end":39},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Variable Australia sample U.S. sample"}