PMC:7376845 / 15508-15557
Annnotations
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T109","span":{"begin":0,"end":49},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Ethical approval was not required for this study."}