PMC:7796148 / 395-501 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T6","span":{"begin":10,"end":77},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"ications. The project was then extended to Italy and several other countries. This article provides an ove"}