PMC:7795966 / 6387-6638 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T49","span":{"begin":180,"end":230},"obj":"Sentence"},{"id":"T50","span":{"begin":232,"end":236},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"olar (n = 72), one duplicate was removed and 68 articles were excluded after abstract review, leading to three articles that were finally included in the present study [20,24,25]. The study selection process is shown in Figure 1b.\n\n3.2. Characteristic"}