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Variation in mean semen parameters of 103 patients, baseline and post-treatment, divided in the sub-group with DFI < 17% (48 patients) and DFI ≥ 17% (55 patients) (Wilcoxon signed-rank test). (A) Baseline DFI < 17%, (B) post treatment DFI < 17%, (C) baseline DFI ≥ 17%, (D) post treatment DFI ≥ 17%. *P < 0.05 ***P < 0.001.
