PMC:7210464 / 91516-91605 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T883","span":{"begin":0,"end":89},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Let ⋅^ denote the estimated value of parameters and ⋅~ denote the counterfactual changes."}