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VOCs that were highly significantly correlated with smoking characteristics. (CAS No. 625-86-5, No. 112-31-2, No. 2216-34-4, and No. 62183-79-3 and No. 2612-46-6 remained significant in the correlation with smoking status, smoking intensity, years of smoking, and depth of smoke inhalation, respectively, after adjustment for age and gender).
