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*Wilcoxon signed ranks test, †one-way ANOVA. Group A: control group, treated for 4 weeks with 160 mg/day Ginkgo biloba extract (Ginexin®), Group B: treated for 4 weeks with 1500 mg/day KRG, Group C: treated for 4 weeks with 3000 mg/day KRG. THI: tinnitus handicap inventory, KRG: Korean red ginseng
