PMC:7062829 / 42684-42890 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T313","span":{"begin":0,"end":20},"obj":"Sentence"},{"id":"T314","span":{"begin":21,"end":169},"obj":"Sentence"},{"id":"T315","span":{"begin":170,"end":206},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Author contributions\nConcept, design, data collection, statistical expertise, analysis and revision, C.H.Y; literature research and critical revision of the article H.J. All authors reviewed the manuscript."}