PMC:7780429 / 8469-8616 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T54","span":{"begin":0,"end":147},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Prior to the analysis of relationships between variables, descriptive analyses of the different areas that make up the study have been carried out."}