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Association between exposure levels and biomarkers estimated by mixed-effects model adjusted for age and sex
Exposure levels are averages of 3 days
UFP ultrafine particles, BC black carbon, FVC forced vital capacity, FEV1 forced expiratory volume in one second, PEF peak expiratory flow rate, LF low frequency component, DNA SB DNA strand breaks
, 
, 
, 
p ≤ 0.08; < 0.05; < 0.01; < 0.001, respectively
