PMC:7103724 / 196-261 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T5","span":{"begin":5,"end":13},"obj":"Sentence"},{"id":"T6","span":{"begin":14,"end":22},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"al.\n\nAbstract\nABSTRACT\nThis study aims to analyze the different c"}