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Si concentration in the serum and the heart following intratracheal instillation (mean ± standard deviation; n=8). (A) Si concentration in the serum; (B) Si concentration in the heart. aP<0.05 vs. control group; bP<0.05 vs. 2 mg/kg·bw group; cP<0.05 vs. 5 mg/kg·bw group. bw, body weight.
