PMC:7160614 / 1088-1244 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T13","span":{"begin":65,"end":72},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"al usage was evaluated by decision curve analysis and nomogram.\n\nResults\nEighteen radiological semantic features and seventeen clinical features were identi"}