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Mean serum dihydrotestosterone (DHT) concentrations during treatment for 24 weeks with topical finasteride, placebo, or oral finasteride. The difference in mean values from baseline to week 24 is shown at the end of each line. * P < 0.05 vs. placebo and oral finasteride at all time points; ** P < 0.05 vs. placebo at all time points. Note: error bars indicate standard deviation.
