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Figure 4: Proportion of human sperm with strong JC1 fluorescence, indicating high MMP, when incubated with 0, 1, 5, and 25 μg ml^{−1} Aroclor 1254 after 6 h. Data are expressed as the mean ± s.d. *Statistical significance compared with the control (n = 6, P < 0.05). 
