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Serum level of total-PSA (a) and the percent ratio free-to-total PSA (b), of the normal controls and the BPH groups when treated with Gingko, Ex, and Ginkgo + Ex. Data were collected and statistically treated with ANOVA and Duncan's multiple range tests (n = 3). Different letters indicate significant difference between groups (P < 0.05). PSA: prostate-specific antigen. BPH: benign prostate hyperplasia. Ex: exercise.
