PMC:7074424 / 9244-9353 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T44","span":{"begin":0,"end":109},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"The database files were extracted using endnote, and title and abstract screening was done using Rayyan QCRI."}