Biomarkers of induced active and passive smoking damage.

Int J Environ Res Public Health · 2009 · PMC2672383 · PMID 19440419

Europe PMC DOI

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highly significantno p-value reported

[ 69 ] who found a highly significant difference in DNA adduct levels between lung cancer patients with GSTM1 null and those with GSTM1 active genotype.

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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.