PMC:7195088 / 2185-2328 JSONTXT

{"project":"LitCovid-PD-CLO","denotations":[{"id":"T6","span":{"begin":36,"end":37},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"},{"id":"T7","span":{"begin":78,"end":79},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"}],"text":"s still remaining partly unclear as a result of an incomplete denominator and a possible lack of adjustment for relevant confounding factors [4"}