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Smoking and salivary 8-OHGua level. (a) Salivary 8-OHGua levels in subjects with Brinkman index ≥400 and Brinkman index <400. Columns represent mean ± SE. *p<0.05 (Mann–Whitney test). (b) Association between current smokers’ Brinkman index and the salivary 8-OHGua level. r represents Spearman’s rank correlation coefficient.
