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Average CSF outflow resistance in intact, saline or kaolin-injected animals. Analysis by both the Kruskal Wallis (p < 0.0001) test and ANOVA (p < 0.0001) revealed that the 3 groups were significantly different. Post-hoc Bonferroni test indicated that the outflow resistance in the kaolin group was significantly greater than that of the saline (p = 0.004) and intact group (p < 0.0001) but no significant difference was observed between saline and intact animals.
