PMC:7362084 / 571-631 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T8","span":{"begin":0,"end":39},"obj":"Sentence"},{"id":"T9","span":{"begin":40,"end":60},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"This article is protected by copyright. All rights reserved."}