PMC:7128678 / 32541-32573
Annnotations
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T255","span":{"begin":0,"end":17},"obj":"Sentence"},{"id":"T256","span":{"begin":18,"end":31},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Ethical approval: Not required."}