Evidence of genetic effects on blood lead concentration.

Environ Health Perspect · 2007 · PMC1940084 · PMID 17687451

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only marginally significantno p-value reported

Educational level showed only marginally significant effects in multivariate analysis, and both residential location and social class were nonsignificant.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.