PMC:7530350 / 539-653 JSONTXT

{"project":"LitCovid-PD-CLO","denotations":[{"id":"T6","span":{"begin":8,"end":9},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"}],"text":"Methods\nA systematic search was conducted in PubMed, Scopus, Web of Science, and Google Scholar on April 19, 2020."}

{"project":"LitCovid-sentences","denotations":[{"id":"T7","span":{"begin":0,"end":7},"obj":"Sentence"},{"id":"T8","span":{"begin":8,"end":114},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Methods\nA systematic search was conducted in PubMed, Scopus, Web of Science, and Google Scholar on April 19, 2020."}