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Effect of single and repeated blast exposure on Tph1 and Tph2 mRNA levels at night in the pineal glands of SD rats. Tph1 mRNA concentrations at (A) 6 h, (B) 24 h, and (C) 1 month after blast injury. Tph2 mRNA concentrations at (D) 6 h, (E) 24 h, and (F) 1 month after blast injury. Results are expressed as means ± SEM (n = 6); ** p < 0.01 and * p < 0.05 for sham vs. single blast group; ## p < 0.01 and # p < 0.05 for sham vs. repeated blast group; ns—not significant.
