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Telomere length of PBMCs isolated at 30 d after ITI exposure to 2.0 mg/rat of MMA-SS welding fume. Vehicle controls received saline. (n = 4–6; values are means ± standard error; *significantly different from MMA-SS groups). (A) The relative telomere length was measured by comparing the ratio of telomere repeat copy number (T) and single gene copy number (S), expressed as telomere length (T/S) ratio. (B) TERT mRNA expression.
