PMC:7156291 / 24876-24968 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T247","span":{"begin":0,"end":11},"obj":"Sentence"},{"id":"T248","span":{"begin":12,"end":27},"obj":"Sentence"},{"id":"T249","span":{"begin":28,"end":60},"obj":"Sentence"},{"id":"T250","span":{"begin":61,"end":92},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Methodology\n• retrospective\n• diagnostic or prognostic study\n• performed at six institutions"}