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Competitive inhibition ELISA assays. Inhibition ability was shown as percentage. LE, leaf extract; VE, vein extract; PGM, porcine gastric mucin; A type saliva, B type saliva, and O type saliva indicated A, B, and O blood type saliva, respectively. The means and standard deviations from independent experiments were presented. Error bars represent standard deviation. Statistical differences of p < 0.05 were indicated by an asterisk and p < 0.01 were indicated by two asterisks.
