PMC:7551987 / 12538-12586 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T81","span":{"begin":0,"end":4},"obj":"Sentence"},{"id":"T82","span":{"begin":5,"end":48},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"2.4. Population Definitions and Parameter Values"}