PMC:7210464 / 33454-33549 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T278","span":{"begin":0,"end":95},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Standard errors in parentheses are clustered by provinces. *** p \u003c 0.01, ** p \u003c 0.05, * p \u003c 0.1"}