PMC:7156291 / 24697-24874 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T244","span":{"begin":0,"end":16},"obj":"Sentence"},{"id":"T245","span":{"begin":17,"end":127},"obj":"Sentence"},{"id":"T246","span":{"begin":128,"end":177},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Ethical approval\nThis study was approved by the Ethics Committee of the First Affiliated Hospital of Xi’an Jiaotong University. Institutional review board approval was obtained."}