PMC:7696151 / 94191-94510 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T601","span":{"begin":28,"end":211},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":" in this systematic review. For selecting the sources, three independent investigators (I.F., F.L., and M.P.) first selected the articles according to the title and abstract and then by analyzing the full-texts. In cases of non-consensus, authors tried to resolve any disagreements by discussion or, if necessary, two m"}