PMC:7781500 / 151-194 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T4","span":{"begin":8,"end":18},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"bstract\nBackground\nPreventive practices are"}