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Percentage inhibition of the ulcer area in rats pre-treated with omeprazole 20 mg/kg and Polygonum minus fractions (F1, F2, F3, F4, and F5; 50 and 100 mg/kg). Each column expresses the mean ± SEM of n = 6 using one-way ANOVA. * p < 0.05 vs. omeprazole.
