PMC:7784786 / 19393-19542 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T174","span":{"begin":0,"end":149},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"The authors state that they have followed the principles outlined in the Declaration of Helsinki for all human or animal experimental investigations."}