PMC:7417198 / 13591-13792 JSONTXT

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{"project":"LitCovid-sentences","denotations":[{"id":"T86","span":{"begin":0,"end":201},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"All procedures performed in studies involving human participants were in accordance with the ethical standards of the 1964 Helsinki declaration and its later amendments or comparable ethical standards."}