PMC:7212965 / 8748-8899 JSONTXT

{"project":"LitCovid-PD-CLO","denotations":[{"id":"T63","span":{"begin":66,"end":67},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"}],"text":"\n\nMethods\n\nInformation Sources and Literature Search\nWe conducted a systematic literature search to identify all published and unpublished studies that"}

{"project":"LitCovid-sentences","denotations":[{"id":"T55","span":{"begin":2,"end":9},"obj":"Sentence"},{"id":"T56","span":{"begin":11,"end":52},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"\n\nMethods\n\nInformation Sources and Literature Search\nWe conducted a systematic literature search to identify all published and unpublished studies that"}