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Effects of extract of hawthorn on oral glucose tolerance in normal mice. Animals in all groups received oral glucose 30 minutes after the extract administration. Blood samples were collected and centrifuged at 3000 rpm for 10 minutes. Each point is the mean ± S.E. of 5 separate mice. *P < 0.05, **P < 0.01, ***P < 0.001 are significantly different compared with the control group in the same time by ANOVA.
