PMC:7646269 / 134-166 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T4","span":{"begin":7,"end":15},"obj":"Sentence"},{"id":"T5","span":{"begin":16,"end":24},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"t al.\n\nAbstract\nAbstract\n\nBackgr"}