PMC:7796111 / 26082-26226 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T180","span":{"begin":0,"end":144},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Due to the exploratory nature of this study, a stepwise entry method was used (with the exception of covariates) to specify regression analysis."}