PMC:7696151 / 5659-5823 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T48","span":{"begin":0,"end":164},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"The analysis of the reference lists from some selected items led to the inclusion of an extra 71 appropriate articles, after titles, abstracts, and full-text study."}